Health

Story Tools: PRINT | Text Size: S M L XL | REPORT TYPO | SEND YOUR FEEDBACK

Less may be more

Comments (8)
By Peter Hadzipetros

Looking to get fit? Well, the price of admission to that club may have just gone down.

The conventional wisdom, expressed by groups like the Heart and Stroke Foundation and the Canadian Medical Association tell us that to be fit, we should get at least 30 minutes of vigorous physical activity every day. That's 210 minutes a week. Three-and-a-half hours. A marathon a week, at a five-minute-per-kilometre pace.

That's a fair bit of exercise — maybe enough to dissuade fitness fence sitters to stay in a sedentary state.

Now, a new study suggests that you might be able to reap significant benefits with substantially less time spent doing vigorous activity.

No, there's no new magic fat-burning workout. No mechanized device that will melt away excess body fat and send your heart off to never-before-seen heights of cardiovascular fitness.

You still have to do the work. Maybe a little less of it. Maybe as little as 72 minutes a week. That's right. You, too, can be fitter by giving up just over an hour of television watching a week. And you can spread that time over the week.

The study — published in the latest edition of the Journal of the American Medical Association — followed 464 sedentary, overweight, postmenopausal women with elevated blood pressure who were 57 years old, on average.

They were told to pedal as hard as they could on a stationary bike, so their fitness levels could be tested. They were then randomly split into four groups. Three of the groups were put on different six-month exercise programs - one group exercised for 72 minutes, another put in 136 minutes per week and the third did 192 minutes per week. The women in the fourth group did not exercise.

At the end of six months, the women who exercised for 72 minutes improved their fitness levels by 4 per cent. The women who exercised for 136 minutes improved by 6 per cent and the women who worked out for 192 minutes were 8 per cent fitter than when they started.

The researchers say the study "should be encouraging to sedentary adults who find it difficult to find the time for 150 minutes of activity per week, let alone 60 minutes per day." But they're not suggesting that health officials lower their recommendation that people should get about 150 minutes of exercise a week to help maintain a healthy lifestyle.

Seventy-two minutes. That's not a lot of time to find in even the busiest of schedules.

« Previous Post | Main | Next Post »

This discussion is now Open. Submit your Comment.

Comments (8)

Marion

Toronto

"1.The most effective way to reduce fat is by maintaining a heartrate 50% higher than your basal rate for 30 minutes a day-any higher and you approach anaerobic which is 1/18th as efficient at consuming fat."

Those are some strange figures. 50% higher than basal for me is 90BPM. Anaerobic rate (i.e. where my heart/lungs can't keep up for more than a few minutes) starts at about 180, or 3x basal rate.

Those 'fat burning efficiency' studies are misleading too, because they measure fat burned per calorie expended (for which the range of values is quite small), not fat burned per unit of time.

Posted July 22, 2007 07:04 PM

Peter

Edmonton

I agree with Minh. If exercise is another chore you have to do then you probably won't do it.

I run with my dog three times a week for 5km each time. It takes us about 50 minutes per session (faster if he wouldn't stop to pee so often). It's a great way to get exercise and walk the dog at the same time. And we both really enjoy it. Edmonton's river valley is great for running year-round.

Going to the gym became a chore, riding the exercise bike at home was unbearably dull, but running outdoors is something I truly enjoy.

Posted June 7, 2007 06:31 PM

Jim

Timmins

I didn't miss the point, I just didn't need a study to tell me how hard I should work out, how long I should work out, or how frequently I should work out. I easily put in 5-6 hours of exercise per week-mostly running(except this week, because I'm preparing for a half marathon this weekend), at various levels of intensity. But as long as we're talking about missing the point; 1.The most effective way to reduce fat is by maintaining a heartrate 50% higher than your basal rate for 30 minutes a day-any higher and you approach anaerobic which is 1/18th as efficient at consuming fat. 2.The study wasn't done on athletes or hockey players, it was done on sedentary, overweight, postmenapausal (i.e. a host of hormonal complications) women, mean age 57. The point I was making was that "fit" means proper nutrition, and the proper attitude towards activity. You have to want to do whatever, as hard,as long as you can, not as somebody else decrees. Add variety to fine tune that fitness level-Pilates/yoga for balance and flexibility, Interval training for peaking the cardio, and even resistance training for the fast twitch muscle (see Ryan, I'm learning). Throw in some activities you might enjoy if you are fit like golf or skiing, and you might just prefer this way of life! I'd be curious to see how many of the women in this study turned exercise into a way of life after the study ended, and how many went back to the couch.

Posted June 6, 2007 10:57 AM

Chris

I think people who have made previous comments have totally missed the point. You can burn more fat by training your body to do more of a physical activity for 3 minutes, thus increasing your heartrate. Then, level off for a few minutes, and then repeat. Basically, this is how athletes have been training all along. Look at hockey players, for example, they get on the ice for a few minutes, they tire out, back to the bench, and then on again. I, myself, am a cyclist. Without previous knowledge about this study, this has been my basic routine. I bike 3-4 times a week for 1-1½ hour each time. It's no wonder I've lost considerable amount of body fat over the past 2 years. This is great news indeed, and I will continue in this style until I am a lean, mean, sculpting machine!

Posted June 5, 2007 10:07 AM

Minh

I say we need to view exercise differently. Not as something we do because of research results, or because of some vague fitness objectives. Exercise time needs not be that time we "set aside" each week. Exercise because you like it, ie, by doing an activity you enjoy. Also , do it in good company sometimes. And incorporate it into your daily routine, like walking part of the way to work. Physical activities can be enjoyable and practical , too.

Posted May 30, 2007 09:39 PM

Jim

Timmins

Geez, not another study. It seems to me that there is so much effort spent on quantifying something as esoteric as fitness that we are marginalizing it. Health isn't exclusively dependent on fitness and vice versa, but it sure gives you a head start towards healthy living. I would like to think that a sedentary state should be enough to chase us off the couch, but it seems that we work pretty hard to find the "path of least resistance". Now this lifestyle is killing us slowly. We make food choices by the lowest common denominator of speed, cost, and convenience and supplement our nutritional debt artificially. We cant exercise unless some "expert" (with all due respect to Ryan, who seems to know what he is talking about) deems it worthy, and then we have to time it, measure the effort, and record it for posterity. I mostly run, and I set the pace and duration by how I feel at that time- sometimes that means I'll golf, bike, snowboard, or even take a day off instead. I really think that we are making this much harder than it really is - set a reasonable goal and just do it! Your body will thank you later.

Posted May 25, 2007 08:58 AM

Ryan

Halifax

I think that this study is misleading somewhat. It's not as simple as more exercise = more benefit, all the time. It's all relative to how hard you workout. Basic F.I.T. (frequency, intensity, time)

You can obtain equal or more benefits from a workout of shorter duration, if your level of effort is higher.

Don't have time to jog for 40 min?? Do sprints for 15.

Don't have time for 3 sets of bench press?? Do one, but make sure you push wayyy outside your comfort zone. (momentary muscle failure)

You have a choice.. Workout harder, or workout longer. You can't do both. But the benefits are the same. (outside the realm of skill or metabolic conditioning of course)

Posted May 24, 2007 04:05 PM

Steve Wood

Yellowknife

I think that the study was point less and has stated the obvious.

- No exercise = No benefits
- Little exercise = Little benefits
- More exercise = More benefits.

I say get the heck off the couch and do something, stop being so lazy because that is what is boils down to.

Posted May 24, 2007 01:47 PM

« Previous Post | Main | Next Post »

Post a Comment

Disclaimer:

Note: By submitting your comments you acknowledge that CBC has the right to reproduce, broadcast and publicize those comments or any part thereof in any manner whatsoever. Please note that due to the volume of e-mails we receive, not all comments will be published, and those that are published will not be edited. But all will be carefully read, considered and appreciated.

Privacy Policy | Submissions Policy

Back of the Pack »

About the Author

Peter HadzipetrosPeter Hadzipetros is a producer for the Consumer and Health sites of CBC News Online. Until he got off the couch and got into long distance running a few years ago, he was a net importer of calories.

More from Peter Hadzipetros »

Recent Posts

Take a break, burn more fat
Peter Hadzipetros
Wednesday, July 18, 2007
On leading horses to water
Peter Hadzipetros
Monday, July 16, 2007
Another day, another toenail
Peter Hadzipetros
Tuesday, July 10, 2007
Cooling off before heating up
Peter Hadzipetros
Friday, June 29, 2007
Growing up cheating
Peter Hadzipetros
Friday, June 22, 2007
Subscribe to this blog

Recent Comments

"1.The most effective way to reduce fat is by maintaining...
Less may be more
I agree with Minh. If exercise is another chore you have ...
Less may be more
I didn't miss the point, I just didn't need a study to te...
Less may be more
I think people who have made previous comments have total...
Less may be more
I say we need to view exercise differently. Not as someth...
Less may be more

Archives

July 2007 (3)
June 2007 (5)
May 2007 (3)
April 2007 (6)
March 2007 (3)
February 2007 (6)
January 2007 (7)
December 2006 (2)
November 2006 (3)
October 2006 (3)
September 2006 (4)
August 2006 (5)
[an error occurred while processing this directive]
Story Tools: PRINT | Text Size: S M L XL | REPORT TYPO | SEND YOUR FEEDBACK

World »

Whitney Houston's funeral to be held Saturday video
Pop star Whitney Houston's funeral service will be held Saturday in the New Jersey church where she first showcased her singing talents as a child.
Eurozone meeting on Greek bailout cancelled video
A meeting of the finance chiefs of the 17 euro countries to discuss Greece's second multibillion bailout planned for Wednesday was called off after Athens failed to deliver on several demands made by its partners in the currency union.
CN blamed for fatal train derailment in Illinois
CN is being blamed for a 2009 train derailment in Illinois, in which several cars went off the tracks and caught fire, killing one person and injuring seven others.
more »

Canada »

updated Legalize pot, say former B.C. attorneys general video
Four former B.C. attorneys general are joining a coalition of health and justice experts calling for the legalization of marijuana.
Online surveillance bill targets child porn: Toews video
A bill that would give police and intelligence agencies new powers to access Canadians' electronic communications is needed to protect against child pornography, says Public Safety Minister Vic Toews.
Botox injected by unlicensed practitioners video
Some Vancouver-area medical spas are ignoring Health Canada regulations that Botox be prescribed and injected by a physician, a CBC News investigation has revealed.
more »

Politics »

Trudeau says sovereignty less of a bogeyman now video
Justin Trudeau says sovereignty is less of a bogeyman than it once was as he defends himself against accusations he's sympathetic to the desire to leave Canada.
Online surveillance bill targets child porn: Toews video
A bill that would give police and intelligence agencies new powers to access Canadians' electronic communications is needed to protect against child pornography, says Public Safety Minister Vic Toews.
MacKay says submarine fleet has 'spotty' history
The ongoing maintenance for Canada's troubled submarine fleet is "on track" despite the damage suffered by HMCS Corner Brook from a crash last year, Defence Minister Peter MacKay says, adding that the history of the fleet is "spotty."
more »

Health »

Chronic fatigue may be reversed with exercise
Taking it easy is not the best treatment for chronic fatigue syndrome, rather exercise and behaviour therapy are, a large study finds.
AT&T buys T-Mobile USA for $39B US
AT&T Inc. said Sunday it will buy T-Mobile USA from Deutsche Telekom AG in a cash-and-stock deal valued at $39 billion US, becoming the largest cellphone company in the U.S.
Milky Way home to 50 billion planets: NASA
Scientists have compiled the first cosmic census of planets in our galaxy: at least 50 billion planets are estimated to call the Milky Way home.
more »

Arts & Entertainment»

audio Regent Park dance studio heralds culture of change audio
A Toronto dance company opens its new home Tuesday in Regent Park — the neighbourhood with Canada's biggest social housing project.
Whitney Houston's funeral to be held Saturday video
Pop star Whitney Houston's funeral service will be held Saturday in the New Jersey church where she first showcased her singing talents as a child.
Prospective WSO maestros unveiled
The Windsor Symphony Orchestra unveiled a shortlist of prospective music directors on Tuesday, and the public will have a hand in selecting the finalist.
more »

Technology & Science »

Online surveillance bill targets child porn: Toews video
A bill that would give police and intelligence agencies new powers to access Canadians' electronic communications is needed to protect against child pornography, says Public Safety Minister Vic Toews.
New iPad anticipated in March
The latest version of Apple's iPad tablet will launch in early March, according to blog and media reports this week.
Higgs boson hunt aided by energy boost
The world's largest particle accelerator is ramping up its beam energy in hopes that scientists will learn definitively this year whether the last undiscovered particle in the Standard Model of Physics exists.
more »

Money »

Eurozone meeting on Greek bailout cancelled video
A meeting of the finance chiefs of the 17 euro countries to discuss Greece's second multibillion bailout planned for Wednesday was called off after Athens failed to deliver on several demands made by its partners in the currency union.
Air Canada confident it can reach deal with pilots
Travellers flying Air Canada can keep booking their flights as negotiations continue with a new federally appointed mediator to help resolve an ongoing contract dispute between the airline and its pilots.
CPP invests $1.8B in U.S. malls
The Canada Pension Plan Investment Board is making a whopping $1.8-billion investment in shopping malls in the U.S. with a new joint venture agreement with the Westfield Group in its biggest real estate deal to date.
more »

Consumer Life »

Honda recalls Fit subcompacts
Honda Canada says it will recall 14,640 of its 2009 and 2010 Fit subcompact cars to replace lost motion springs.
U.S. travel fee proposal criticized by Harper
Prime Minister Stephen Harper says he doesn't think much of a new border tax that's being proposed by the United States, calling it a cash grab designed to help a budget crisis.
Bell class action suit approved by Que. court
A Quebec Superior Court judge has authorized a class action lawsuit to go ahead against Bell Mobility.
more »

Sports »

Scores: NHL NBA

Lin, Knicks stun Raptors with rally
Jeremy Lin, the NBA phenomenon who went from a seldom-used player to the league's hottest story in the span of a week, drained a three-point shot with 0.5 seconds on the clock to lift the New York Knicks to their sixth consecutive victory, 90-87 over the Toronto Raptors.
Spezza's hat trick burns Lightning
Jason Spezza had three goals and an assist, Craig Anderson made 28 saves, and the Ottawa Senators beat the Tampa Bay Lightning 4-0 on Tuesday night.
Messi, Barcelona master Leverkusen: Champions League video
Lionel Messi helped Barcelona shake off its domestic troubles in Spain by inspiring the defending champions to a 3-1 victory at Bayer Leverkusen in the round of 16 of the Champions League.
more »

Diversions »

[an error occurred while processing this directive]
more »