DealBook: Confidence on Upswing, Mergers Make Comeback

The mega-merger is back.

For the corporate takeover business, the last half-decade was a fallow period. Wall Street deal makers and chief executives, brought low by the global financial crisis, lacked the confidence to strike the audacious multibillion-dollar acquisitions that had defined previous market booms.

Cycles, however, turn, and in the opening weeks of 2013, merger activity has suddenly roared back to life. On Thursday, Berkshire Hathaway, the conglomerate run by Warren E. Buffett, said it had teamed up with Brazilian investors to buy the ketchup maker H. J. Heinz for about $23 billion. And American Airlines and US Airways agreed to merge in a deal valued at $11 billion.

Those transactions come a week after a planned $24 billion buyout of the computer company Dell by its founder, Michael S. Dell, and private equity backers. And Liberty Global, the company controlled by the billionaire media magnate John C. Malone, struck a $16 billion deal to buy the British cable business Virgin Media.

“Since the crisis, one by one, the stars came into alignment, and it was only a matter of time before you had a week like we just had,” said James B. Lee Jr., the vice chairman of JPMorgan Chase.

Still, bankers and lawyers remain circumspect, warning that it is still too early to declare a mergers-and-acquisitions boom like those during the junk bond craze of 1989, the dot-com bubble of 1999 and the leveraged buyout bonanza of 2007. They also say that it is important to pay heed to the excesses that developed during these moments of merger mania, which all ended badly.

A confluence of factors has driven the recent deals. Most visibly, the stock market has been on a tear, with the Standard & Poor’s 500-stock index this week briefly hitting its highest levels since November 2007. Higher share prices have buoyed the confidence of chief executives, who now, instead of retrenching, are looking for ways to expand their businesses.

A number of clouds that hovered over the markets last year have also been removed, eliminating the uncertainty that hampered deal making. Mergers and acquisitions activity in 2012 remained tepid as companies took a wait-and-see approach over the outcome of the presidential election and negotiations over the fiscal cliff. The problems in Europe, which began in earnest in 2011, shut down a lot of potential transactions, but the region has since stabilized.

“When we talk to our corporate clients as well as the bankers, we keep hearing them talk about increased confidence,” said John A. Bick, a partner at the law firm Davis Polk & Wardwell, who advised Heinz on its acquisition by Mr. Buffett and his partners.

Mr. Bick said that mega-mergers had a psychological component, meaning that once transactions start happening, chief executives do not want to be left behind. “In the same way that success breeds success, deals breed more deals,” he said.

A central reason for the return of big transactions is the mountain of cash on corporate balance sheets. After the financial crisis, companies hunkered down, laying off employees and cutting costs. As a result, they generated savings. Today, corporations in the S.& P. 500 are sitting on more than $1 trillion in cash. With interest rates near zero, that money is earning very little in bank accounts, so executives are looking to put it to work by acquiring businesses.

The private equity deal-making machine is also revving up again. The world’s largest buyout firms have hundreds of billions of dollars of “dry powder” — money allotted to deals in Wall Street parlance — and they are on the hunt. The proposed leveraged buyout of Dell, led by Mr. Dell and the investment firm Silver Lake Partners, was the largest private equity transaction since July 2007, when the Blackstone Group acquired the hotel chain Hilton Worldwide for $26 billion just as the credit markets were seizing up.

But perhaps the single biggest factor driving the return of corporate takeovers is the banking system’s renewed health. Corporations often rely on bank loans for financing acquisitions, and the ability of private equity firms to strike multibillion-dollar transactions depends on the willingness of banks to lend them money.

For years, banks, saddled by the toxic mortgage assets weighing on their balance sheets, turned off the lending spigot. But with the housing crisis in the rearview mirror and economic conditions slowly improving, banks are again lining up to provide corporate loans at record-low interest rates to finance acquisitions.

The banks, of course, are major beneficiaries of megadeals, earning big fees from both advising on the transactions and lending money to finance them. Mergers and acquisitions in the United States total $158.7 billion so far this year, according to Thomson Reuters data, more than double the amount in the same period last year. JPMorgan, for example, has benefited from the surge, advising on four big deals in recent weeks, including the Dell bid and Comcast’s $16.7 billion offer for the rest of NBCUniversal that it did not already own.

Mr. Buffett, in a television interview last month, declared that the banks had repaired their businesses and no longer posed a threat to the economy. “The capital ratios are huge, the excesses on the asset aside have been largely cleared out,” said Mr. Buffett, whose acquisition of Heinz will be his second-largest acquisition, behind his $35.9 billion purchase of a majority stake in the railroad company Burlington Northern Santa Fe in 2009.

While Wall Street has an air of giddiness over the year’s start, most deal makers temper their comments about the current environment with warnings about undisciplined behavior like overpaying for deals and borrowing too much to pay for them.

Though private equity firms were battered by the financial crisis, they made it through the downturn on relatively solid ground. Many of their megadeals, like Hilton, looked destined for bankruptcy after the markets collapsed, but they have since recovered. The deals have benefited from an improving economy, as well as robust lending markets that allowed companies to push back the large amounts of debt that were to have come due in the next few years.

But there are still plenty of cautionary tales about the consequences of overpriced, overleveraged takeovers. Consider Energy Future Holdings, the biggest private equity deal in history. Struck at the peak of the merger boom in October 2007, the company has suffered from low natural gas prices and too much debt, and could be forced to restructure this year. Its owners, a group led by Kohlberg Kravis Roberts and TPG, are likely to lose billions.

Even Mr. Buffett made a mistake on Energy Future Holdings, having invested $2 billion in the company’s bonds. He admitted to shareholders last year that the investment was a blunder and would most likely be wiped out.

“In tennis parlance,” Mr. Buffett wrote, “this was a major unforced error.”

Michael J. de la Merced contributed reporting.

A version of this article appeared in print on 02/15/2013, on page A1 of the NewYork edition with the headline: Confidence on Upswing, Mergers Make Comeback.
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Pope Says He Will Be ‘Hidden To The World’ In Retirement





VATICAN CITY — Saying he would soon be “hidden to the world,” Pope Benedict XVI took his leave of parish priests and clergy of the Diocese of Rome on Thursday in a moving encounter during which he gave a personal, and incisive, recollection of the Second Vatican Council, the gathering of bishops 50 years ago that set the Roman Catholic Church’s course for the future.




Benedict, who announced his resignation four days ago — the first pope to step down willingly in nearly 600 years — also indicated that he would not hold a public role once his resignation becomes official on Feb. 28.


“Though I am now retiring to a life of prayer, I will always be close to all of you and I am sure all of you will be close to me, even though I remain hidden to the world,” he told the assembly of hundreds of priests, who had greeted him with a long, standing ovation and some tears.


The pope will live in a convent inside Vatican City.


At a news briefing Thursday, the Rev. Federico Lombardi, the Vatican spokesman, said Benedict’s longtime personal secretary, Archbishop Georg Gänswein, who was also named prefect of the papal household two months ago, would continue to work for him.


Father Lombardi said he saw no conflict of interest if Archbishop Gänswein served the current pope and his successor.


The prefect is responsible for logistical duties, and “in this sense it is not a profound problem, I think,” Father Lombardi said.


The nuns who currently tend to the pope will also live with the pontiff once he is no longer pope.


Father Lombardi also confirmed news reports that the pope had had an accident during a trip to Mexico last March, hitting his head in the middle of the night, but he denied that the episode had influenced the pontiff’s decision to retire.


Since his surprise announcement on Monday, which stunned the Roman Catholic world, there has been much closer public scrutiny of the pope’s health.


The 85-year-old pope — who has appeared increasingly frail in recent public appearances — said he felt he did not have the strength to continue in his ministry.


On Tuesday, the Vatican confirmed for the first time that the pope had had a pacemaker since his time as a cardinal and had its batteries changed three months ago.


“It didn’t impact on the trip or on his decision,” Father Lombardi said, pointing out that the pope had kept his appointments as scheduled.


The priests from the Rome diocese who attended Benedict’s audience said they felt they had witnessed a powerful moment in church history, one that also humanized a pope who has often seemed remote. “It moved me to see the pope smile,” said Don Mario Filippa, a priest in Rome. “He has found peace within himself.”


“It was a part of history,” said Father Martin Astudillo, 37, an Argentine priest who is studying in Rome. “This is a man of God who at the end of his public role transmits his vision of the church and relationship with the church,” he added. “We saw in a few words a real synthesis of his vision of the church and what he expects from whomever takes over.”


In his remarks, which touched on some of the thorniest issues of his papacy, Benedict also spoke about how the Second Vatican Council had explored ideas of “continuity” between Old and New Testaments, and of the relationship between the Catholic and Jewish faiths.


“Even if it’s clear that the church isn’t responsible for the Shoah, it’s for the most part Christians who did this crime,” Benedict said of the Holocaust, adding that this called for a need to “deepen and renovate the Christian conscience,” even if it’s true that “real believers only fought against” Nazi barbarism.


During the 45-minute reflection — or “chat” in his words — on the council, he also recalled the “incredible” expectations of bishops going into the gathering.


“We were full of hope, enthusiasm and also of good will,” he said.


But while the council made landmark decisions that would propel the church into the future, much got lost in the media’s interpretation of what transpired, he said, which led to the “calamities” that have marred recent church history.


The media reduced the proceedings “into a political power struggle between different currents of the church,” and they chose sides that suited their individual vision of the world, the pope said.


These messages, not that of the council, entered into the public sphere and that led in the years to “so many calamities, so many problems, seminaries closed, convents that closed, the liturgy trivialized,” the pope said.


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Gadgetwise Blog: Tip of the Week: Adjusting Facebook Photo Previews

Hate the way Facebook seems to arbitrarily crop photos you post on your Timeline to fit the square preview windows? On the desktop version, you can change which part of the picture shows in the preview when you’re using Facebook through your Web browser.

To do so, pass the cursor over the image and then click the pencil icon that appears in the top right corner of the post. On the menu that appears, choose Reposition Photo. Click the cursor onto the photo and drag the image until you have the crop you desire for the preview window. Click the Save button. Even though you have now made the photo more appealing for friends browsing your Timeline page, the original image remains uncropped and expands into the full view when someone clicks on the preview window.

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Well: The Well Flu Quiz

What surface is the most friendly to the flu virus? Where’s the best place to stand when you’re talking to a sick person? And how are Australians curbing germs in schools? To find out these answers and more, take the Well Flu Quiz.

With contributions from Laura Geggel and Tara Parker-Pope.

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Well: The Well Flu Quiz

What surface is the most friendly to the flu virus? Where’s the best place to stand when you’re talking to a sick person? And how are Australians curbing germs in schools? To find out these answers and more, take the Well Flu Quiz.

With contributions from Laura Geggel and Tara Parker-Pope.

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DealBook: Berkshire and 3G Capital to Buy Heinz for $23 Billion

10:12 a.m. | Updated

Warren E. Buffett has found another American icon worth buying: H. J. Heinz.

Berkshire Hathaway, the giant conglomerate that Mr. Buffett runs, said on Thursday that it would buy the food giant for about $23 billion, adding Heinz ketchup to its stable of prominent brands.

The proposed acquisition, coming fast on the heels of a planned $24 billion buyout of the computer maker Dell and a number of smaller deals, heralds a possible reemergence in merger activity.  The number of deals and the prices being paid for companies are still a far cry from the lofty heights of the boom before the financial crisis.  But an improving stock market, growing confidence among business executives and mounting piles of cash held by corporations and private equity funds all favor a return to deal-making. 

Mr. Buffett is teaming up with 3G Capital Management, a Brazilian-backed investment firm that owns a majority stake in a company whose business is complementary to Heinz’s: Burger King.

Under the terms of the deal, Berkshire and 3G will pay $72.50 a share, about 20 percent above Heinz’s closing price on Wednesday. Including debt, the transaction is valued at $28 billion.

“This is my kind of deal and my kind of partner,” Mr. Buffett told CNBC on Thursday. “Heinz is our kind of company with fantastic brands.”

In many ways, Heinz fits Mr. Buffett’s deal criteria almost to a T. It has broad brand recognition – besides ketchup, it owns Ore-Ida and Lea & Perrins Worcestershire sauce – and has performed well. Over the last 12 months, its stock has risen nearly 17 percent.

Mr. Buffett told CNBC that he had a file on Heinz dating back to 1980. But the genesis of Thursday’s deal actually lies with 3G, an investment firm backed by several wealthy Brazilian families, according to a person with direct knowledge of the matter.

One of the firm’s principal backers, Jorge Paulo Lemann, brought the idea of buying Heinz to Berkshire about two months ago, this person said. Mr. Buffett agreed, and the two sides approached Heinz’s chief executive, William R. Johnson, about buying the company.

“We look forward to partnering with Berkshire Hathaway and 3G Capital, both greatly respected investors, in what will be an exciting new chapter in the history of Heinz,” Mr. Johnson said in a statement.

Berkshire and 3G will each contribute about $4 billion in cash to pay for the deal, with Berkshire also paying $8 billion for preferred shares. The rest of the cost will be covered by debt financing raised by JPMorgan Chase and Wells Fargo.

Mr. Buffett told CNBC that 3G would be the primary supervisor of Heinz’s operations, saying, “Heinz will be 3G’s baby.”

The food company’s headquarters will remain in Pittsburgh, Heinz’s home for over 120 years.

Heinz’s stock was up nearly 20 percent in morning trading, at $72.51, closely mirroring the offered price. Berkshire’s class A stock was also up slightly, rising 0.64 percent to $148,691 a share.

Heinz was advised by Centerview Partners, Bank of America Merrill Lynch and the law firm Davis Polk & Wardwell. A transaction committee of the company’s board was advised by Moelis & Company and Wachtell, Lipton, Rosen & Katz.

Berkshire’s and 3G’s lead adviser was Lazard, with JPMorgan and Wells Fargo providing additional advice. Kirkland & Ellis provided legal advice to 3G, while Berkshire relied on its usual law firm, Munger, Tolles & Olson.

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At War Blog: How to Help Veterans Succeed in College

In 2004, I returned from a year in Iraq to finish my undergraduate degree at the University of Rhode Island. Since I took more than a year’s leave of absence to deploy, I was forced to reapply to the university. While writing another entrance essay to explain how I spent my “year off,” I wondered why my school didn’t have a peer support system for its students who are veterans.

In just a few years, the narrative for veterans on my campus and many others has changed dramatically because of the hard work of student-led veterans’ groups like the ones I met at the recent Student Veterans of America national conference in Orlando.

The conference showed me how student veterans continue to look out for the best interests of their comrades on campus, much like they did in the military. Plus, as college veterans’ groups grow in size and influence, they manage to affect positive change in their communities. In January, veterans at Clemson University commissioned a volunteer-led veterans’ resource center where veterans can receive transitional assistance, career guidance, and peer support. Meanwhile, veterans at Florida State University continue to push the state legislature to change archaic in-state tuition policies.

Over a few beers, veterans opened up about some of the challenges they faced when coming back to college, like immature classmates or closed-minded professors, but they also readily shared ways they worked to build understanding on campus through their organized veterans’ groups.

Unfortunately, the conference also reinforced a lingering concern that many of today’s student veterans must still choose their schools and navigate the complexities of college life on the fly when they arrive on campus.

As an article in the Education Life section of The New York Times details, many colleges have stepped up to offer in-depth counseling to incoming student veterans, with some going so far as to offer orientation programs and learning communities specifically for veteran undergraduates. The one flaw to this system, however, is that at this point, the veteran has already chosen an institution. What if he or she just isn’t academically or financially ready for college?

In 2010’s National Survey of Veterans, more than 40 percent of post-9/11 veterans reported that they were not aware of and did not understand their education benefits. Veterans should be armed with quality information before they start the application process. Once a veteran is on campus, it may be too late. Is this lack of up-front information perhaps driving misconceptions that veterans won’t succeed when they arrive on campus?

When I started college more than a decade ago, I missed orientation because of basic training. I then struggled to find good information on using my benefits from the G.I. Bill of Rights and had to write a personal check just to get my grades. As a 19-year-old student who lived in a dormitory with few financial obligations, I had the time and the leftover Army income to foot the bill and sort out the G.I. Bill later. Many veterans don’t have this luxury.

So who should be responsible for informing veterans about the nuances of higher education? Federal law dictates that some of the responsibility falls on the military and the Department of Veterans Affairs. Separating service members have access to the military transition assistance program, or TAP, and those who have left active duty are entitled to free educational counseling from the veterans department. The department offers the 1-888-GIBILL-1 hotline and the eBenefits online portal, but neither is equipped to answer in-depth questions on higher education, nor can they be used to register for counseling.

I recently participated in both the Department of Veterans Affairs counseling and T.A.P. To apply for counseling, I had to find a form online, print it and mail it to my closest veterans affairs office. Two months later, I received a letter from a department contractor, asking me to take aptitude and interest tests to determine my career goals. The bubble sheet exams confirmed that I worked in the right industry, so I was finally referred to a counselor who could meet one on one.

The counseling process helped answer my questions, but I found some of the steps unnecessary and confusing, which likely discourages other veterans from using it too. Nevertheless, it worked. Wouldn’t the department want to enroll more veterans?

The agency only has about $6 million each year to deliver G.I. Bill counseling. Last year the Congressional Budget Office analyzed a proposal to make it easier for veterans to apply for educational aid, but the cost would have been high. During the recent conference, I asked the audience if anyone knew that the department even offered educational counseling. Only a couple of veterans raised their hands.

T.A.P. is not particularly helpful for veterans looking for information about education benefits. When I attended the benefits briefing last spring, the instructor focused on other veterans programs, such as health care, home loans and disability compensation, fielding dozens of questions along the way. When education benefits finally came up, the instructor was fighting the clock and glossed over the material, apparently assuming that service members understood the nuances of the highly promoted benefit. But clearly they do not.

Some T.A.P. facilities do better than others, offering resources like guidance counselors for separating service members. But these innovations seem to be have been developed at the discretion of individual program facilitators, and service members must carve out personal time to use them.

Still, my outlook for current student veterans remains overwhelmingly positive. Not only are veterans and colleges stepping up to take care of their own, but policy makers in Washington have recognized deficiencies in programs and are finally taking steps to fix some of them.

Thanks to the Vow to Hire Heroes Act of 2011, the Pentagon is piloting new T.A.P. curricula geared toward college-bound veterans. Because of an April executive order, the Pentagon, Department of Veterans Affairs and other federal agencies are compiling student outcome information and developing ways to track student feedback from colleges that are eligible for GI Bill students. Finally, because of last month’s Improving Transparency of Education Opportunities for Veterans Act, Congress has required the Department of Veterans Affairs to provide more information on how veterans are faring at individual colleges, and department is looking to deliver more cost-effective counseling tools for student veterans.

With all of these changes afloat, the veterans community must keep the pressure on the Pentagon, Department of Veterans Affairs, Congress and schools to ensure that educational information is relevant and easy to access for student veterans.

The first four-year class of Post-9/11 G.I. Bill veterans will graduate this spring, and I look forward to following their successes after college. For those still serving who plan to use their benefits in the future, we have an opportunity to arm them with the best information to get the most out of their G.I. Bill.

We never send a new recruit to war without proper training and equipment. We should never send a veteran to college without reasonable guidance for what lies ahead.

Ryan Gallucci is the deputy legislative director for the Veterans of Foreign Wars in Washington, where he focuses on economic opportunity policy for veterans and maintains the VFW’s Capitol Hill blog. He deployed to Iraq as an Army Civil Affairs specialist in 2003 and 2004 before completing his undergraduate studies at the University of Rhode Island in 2006.

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Tech Companies and Immigrant Advocates Press for Broad Changes in Law





SAN FRANCISCO — What do computer programmers and illegal immigrants have to do with each other?




When it comes to the sweeping overhaul of the nation’s immigration laws that Congress is considering this year, the answer is everything.


Silicon Valley executives, who have long pressed the government to provide more visas for foreign-born math and science brains, are joining forces with an array of immigration groups seeking comprehensive changes in the law. And as momentum builds in Washington for a broad revamping, the tech industry has more hope than ever that it will finally achieve its goal: the expanded access to visas that it says is critical to its own continued growth and that of the economy as a whole.


Signs of the industry’s stepped-up engagement on the issue are visible everywhere. Prominent executives met with President Obama last week. Start-up founders who rarely abandon their computers have flown across the country to meet with lawmakers.


This Tuesday, the Technology CEO Council, an advocacy organization representing companies like Dell, Intel and Motorola, had meetings on Capitol Hill. On Wednesday, Steve Case, a founder of AOL, is scheduled to testify at the first Senate hearing this year on immigration legislation, alongside the head of the deportation agents’ union and the leader of a Latino civil rights group.


“The odds of high-skilled passing without comprehensive is close to zero, and the odds of comprehensive passing without high-skilled passing is close to zero,” said Robert D. Atkinson, president of the Information Technology and Innovation Foundation, a nonpartisan research group based in Washington.


The push comes as a clutch of powerful Senate Republicans and Democrats have reached a long-elusive agreement on some basic principles of a “comprehensive” revamping of immigration law. Separately, a bipartisan bill introduced in the Senate in late January focuses directly on the visa issue.


The industry’s argument for more so-called high-skilled visas has already persuaded the president.


“Real reform means fixing the legal immigration system to cut waiting periods, reduce bureaucracy, and attract the highly-skilled entrepreneurs and engineers that will help create jobs and grow our economy,” Mr. Obama said in Tuesday’s State of the Union speech.


In a speech in Las Vegas in January in which he introduced his own blueprint for overhauling immigration law, Mr. Obama embraced the idea that granting more visas was essential to maintaining innovation and job growth. He talked about foreigners studying at American universities, figuring out how to turn their ideas into businesses.


In part, the new alliance between the tech industry and immigration groups was born out of the 2012 elections and the rising influence of Hispanic voters.


“The world has changed since the election,” said Peter J. Muller, director of government relations at Intel, pointing out that the defeat of many Republican candidates had led to a softening of the party’s position on broad changes to immigration law. “There is a focus on comprehensive. We’re thrilled by it.”


“At this point,” he added, “our best hope for immigration reform lies with comprehensive reform.”


Mr. Case, the AOL co-founder, who now runs an investment fund, echoed that sentiment after meeting with the president last Tuesday.


“I look forward to doing whatever I can to help pass comprehensive immigration reform in the months ahead,” he said, “and ensure it includes strong provisions regarding high-skilled immigration, so we are positioned to win the global battle for talent.”


That sort of sentiment delights immigrants’ rights advocates who have banged their heads against the wall for years to rally a majority of Congress around their agenda.


“The stars are aligning here,” said Ali Noorani, executive director of the National Immigration Forum. “You’ve got the politics of immigration reform changing. You’ve got tech leaders leaning in not just for high-skilled but for broader immigration reform.”


Senator Orrin G. Hatch, Republican of Utah, who is co-sponsoring the bill to increase the number of visas available for highly skilled immigrants, said the cooperation went both ways.


“All the talk about the STEM field — science, technology, engineering, mathematics — has awakened even those who aren’t all that interested in the high-tech world,” he said.


While the growing momentum has surprised many in Washington, comprehensive change is still not a sure thing, especially in the Republican-controlled House.


Mr. Hatch said he would push forward with his measure even if the broader efforts foundered. But his Democratic co-sponsor, Amy Klobuchar of Minnesota, said she would press for the bill to be part of the comprehensive package.


Last year, technology executives had a taste of what could happen with stand-alone legislation.


Julia Preston contributed reporting from New York.



This article has been revised to reflect the following correction:

Correction: February 13, 2013

A previous version of this article incorrectly said H-1B visas are capped at 60,000 a year. The basic annual cap for H-1B visas is 65,000.



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Phys Ed: Getting the Right Dose of Exercise

Phys Ed

Gretchen Reynolds on the science of fitness.

A common concern about exercise is that if you don’t do it almost every day, you won’t achieve much health benefit. But a commendable new study suggests otherwise, showing that a fairly leisurely approach to scheduling workouts may actually be more beneficial than working out almost daily.

For the new study, published this month in Exercise & Science in Sports & Medicine, researchers at the University of Alabama at Birmingham gathered 72 older, sedentary women and randomly assigned them to one of three exercise groups.

One group began lifting weights once a week and performing an endurance-style workout, like jogging or bike riding, on another day.

Another group lifted weights twice a week and jogged or rode an exercise bike twice a week.

The final group, as you may have guessed, completed three weight-lifting and three endurance sessions, or six weekly workouts.

The exercise, which was supervised by researchers, was easy at first and meant to elicit changes in both muscles and endurance. Over the course of four months, the intensity and duration gradually increased, until the women were jogging moderately for 40 minutes and lifting weights for about the same amount of time.

The researchers were hoping to find out which number of weekly workouts would be, Goldilocks-like, just right for increasing the women’s fitness and overall weekly energy expenditure.

Some previous studies had suggested that working out only once or twice a week produced few gains in fitness, while exercising vigorously almost every day sometimes led people to become less physically active, over all, than those formally exercising less. Researchers theorized that the more grueling workout schedule caused the central nervous system to respond as if people were overdoing things, sending out physiological signals that, in an unconscious internal reaction, prompted them to feel tired or lethargic and stop moving so much.

To determine if either of these possibilities held true among their volunteers, the researchers in the current study tracked the women’s blood levels of cytokines, a substance related to stress that is thought to be one of the signals the nervous system uses to determine if someone is overdoing things physically. They also measured the women’s changing aerobic capacities, muscle strength, body fat, moods and, using sophisticated calorimetry techniques, energy expenditure over the course of each week.

By the end of the four-month experiment, all of the women had gained endurance and strength and shed body fat, although weight loss was not the point of the study. The scientists had not asked the women to change their eating habits.

There were, remarkably, almost no differences in fitness gains among the groups. The women working out twice a week had become as powerful and aerobically fit as those who had worked out six times a week. There were no discernible differences in cytokine levels among the groups, either.

However, the women exercising four times per week were now expending far more energy, over all, than the women in either of the other two groups. They were burning about 225 additional calories each day, beyond what they expended while exercising, compared to their calorie burning at the start of the experiment.

The twice-a-week exercisers also were using more energy each day than they had been at first, burning almost 100 calories more daily, in addition to the calories used during workouts.

But the women who had been assigned to exercise six times per week were now expending considerably less daily energy than they had been at the experiment’s start, the equivalent of almost 200 fewer calories each day, even though they were exercising so assiduously.

“We think that the women in the twice-a-week and four-times-a-week groups felt more energized and physically capable” after several months of training than they had at the start of the study, says Gary Hunter, a U.A.B. professor who led the experiment. Based on conversations with the women, he says he thinks they began opting for stairs over escalators and walking for pleasure.

The women working out six times a week, though, reacted very differently. “They complained to us that working out six times a week took too much time,” Dr. Hunter says. They did not report feeling fatigued or physically droopy. Their bodies were not producing excessive levels of cytokines, sending invisible messages to the body to slow down.

Rather, they felt pressed for time and reacted, it seems, by making choices like driving instead of walking and impatiently avoiding the stairs.

Despite the cautionary note, those who insist on working out six times per week need not feel discouraged. As long as you consciously monitor your activity level, the findings suggest, you won’t necessarily and unconsciously wind up moving less over all.

But the more fundamental finding of this study, Dr. Hunter says, is that “less may be more,” a message that most likely resonates with far more of us. The women exercising four times a week “had the greatest overall increase in energy expenditure,” he says. But those working out only twice a week “weren’t far behind.”

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Phys Ed: Getting the Right Dose of Exercise

Phys Ed

Gretchen Reynolds on the science of fitness.

A common concern about exercise is that if you don’t do it almost every day, you won’t achieve much health benefit. But a commendable new study suggests otherwise, showing that a fairly leisurely approach to scheduling workouts may actually be more beneficial than working out almost daily.

For the new study, published this month in Exercise & Science in Sports & Medicine, researchers at the University of Alabama at Birmingham gathered 72 older, sedentary women and randomly assigned them to one of three exercise groups.

One group began lifting weights once a week and performing an endurance-style workout, like jogging or bike riding, on another day.

Another group lifted weights twice a week and jogged or rode an exercise bike twice a week.

The final group, as you may have guessed, completed three weight-lifting and three endurance sessions, or six weekly workouts.

The exercise, which was supervised by researchers, was easy at first and meant to elicit changes in both muscles and endurance. Over the course of four months, the intensity and duration gradually increased, until the women were jogging moderately for 40 minutes and lifting weights for about the same amount of time.

The researchers were hoping to find out which number of weekly workouts would be, Goldilocks-like, just right for increasing the women’s fitness and overall weekly energy expenditure.

Some previous studies had suggested that working out only once or twice a week produced few gains in fitness, while exercising vigorously almost every day sometimes led people to become less physically active, over all, than those formally exercising less. Researchers theorized that the more grueling workout schedule caused the central nervous system to respond as if people were overdoing things, sending out physiological signals that, in an unconscious internal reaction, prompted them to feel tired or lethargic and stop moving so much.

To determine if either of these possibilities held true among their volunteers, the researchers in the current study tracked the women’s blood levels of cytokines, a substance related to stress that is thought to be one of the signals the nervous system uses to determine if someone is overdoing things physically. They also measured the women’s changing aerobic capacities, muscle strength, body fat, moods and, using sophisticated calorimetry techniques, energy expenditure over the course of each week.

By the end of the four-month experiment, all of the women had gained endurance and strength and shed body fat, although weight loss was not the point of the study. The scientists had not asked the women to change their eating habits.

There were, remarkably, almost no differences in fitness gains among the groups. The women working out twice a week had become as powerful and aerobically fit as those who had worked out six times a week. There were no discernible differences in cytokine levels among the groups, either.

However, the women exercising four times per week were now expending far more energy, over all, than the women in either of the other two groups. They were burning about 225 additional calories each day, beyond what they expended while exercising, compared to their calorie burning at the start of the experiment.

The twice-a-week exercisers also were using more energy each day than they had been at first, burning almost 100 calories more daily, in addition to the calories used during workouts.

But the women who had been assigned to exercise six times per week were now expending considerably less daily energy than they had been at the experiment’s start, the equivalent of almost 200 fewer calories each day, even though they were exercising so assiduously.

“We think that the women in the twice-a-week and four-times-a-week groups felt more energized and physically capable” after several months of training than they had at the start of the study, says Gary Hunter, a U.A.B. professor who led the experiment. Based on conversations with the women, he says he thinks they began opting for stairs over escalators and walking for pleasure.

The women working out six times a week, though, reacted very differently. “They complained to us that working out six times a week took too much time,” Dr. Hunter says. They did not report feeling fatigued or physically droopy. Their bodies were not producing excessive levels of cytokines, sending invisible messages to the body to slow down.

Rather, they felt pressed for time and reacted, it seems, by making choices like driving instead of walking and impatiently avoiding the stairs.

Despite the cautionary note, those who insist on working out six times per week need not feel discouraged. As long as you consciously monitor your activity level, the findings suggest, you won’t necessarily and unconsciously wind up moving less over all.

But the more fundamental finding of this study, Dr. Hunter says, is that “less may be more,” a message that most likely resonates with far more of us. The women exercising four times a week “had the greatest overall increase in energy expenditure,” he says. But those working out only twice a week “weren’t far behind.”

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