New study shows fat "after burn" after exercise is a myth

[Morfiend]

The New York Times' Well blog reports that 'for some time, researchers have been finding that people who exercise don't necessarily lose weight.' A study published online in September 2009 in The British Journal of Sports Medicine was the latest to report apparently disappointing slimming results. In the study, 58 obese people completed 12 weeks of supervised aerobic training without changing their diets. The group lost an average of a little more than seven pounds, and many lost barely half that. It also shows that the 'after burn' effect of exercise or the believe that we burn calories well after exercise seems to be a myth.

here is a link to this article:

http://well.blogs.nytimes.com/2009/1...o-weight-loss/

[snorkelman]

Ahhhh, the fat-burning zone recommendations are coming back. This should sell some fitness equipment and make mediocre trainers happy again, as I am sure they will use this study to promote such a concept.

[ZidaneValor]

1) So they lost 7 pounds in 12 weeks, and that concludes that exercise doesn't burn calories?

2) Where is the control group?

3) Why is nobody keeping track of calories eaten?

4) Why is nobody lifting weights in this study?

5) Even if you burn a higher "percentage" of calories from fat loss, you would burn more calories, and even more calories from fat, if you worked out harder.

[Morfiend]

1) So they lost 7 pounds in 12 weeks, and that concludes that exercise doesn't burn calories?

2) Where is the control group?

3) Why is nobody keeping track of calories eaten?

4) Why is nobody lifting weights in this study?

5) Even if you burn a higher "percentage" of calories from fat loss, you would burn more calories, and even more calories from fat, if you worked out harder.

No one concluded that exercising doesn't burn calories. The most interesting point ive found is that it seems that the 'after burn' effect where everyone claims you burn calories way after exercising is a myth.

[Shr3dJunki3]

My research shows that 100% of people who burn 3500 calories lose weight.

[Alex465]

This the reason why I stay away from reading these so called scientific boohoos. Got me all confused and I end up trying everything yet achieving nothing. I've got to listen to my body and do what works for me.

[ZidaneValor]

No one concluded that exercising doesn't burn calories. The most interesting point ive found is that it seems that the 'after burn' effect where everyone claims you burn calories way after exercising is a myth.

Each of Melanson?s subjects spent 24 quiet hours in the calorimeter, followed later by another 24 hours that included an hourlong bout of stationary bicycling. The cycling was deliberately performed at a relatively easy intensity (about 55 percent of each person?s predetermined aerobic capacity). It is well known physiologically that, while high-intensity exercise demands mostly carbohydrate calories (since carbohydrates can quickly reach the bloodstream and, from there, laboring muscles), low-intensity exercise prompts the body to burn at least some stored fat. All of the subjects ate three meals a day.

To their surprise, the researchers found that none of the groups, including the athletes, experienced ?afterburn.? They did not use additional body fat on the day when they exercised. In fact, most of the subjects burned slightly less fat over the 24-hour study period when they exercised than when they did not.

Ok, so what about the number of carbohydrate calories burned? What about weight training? What about cycling at a higher intensity? What about plyometrics?

They took one small fraction of the types of exercise that people do, and came to an overall conclusion. All they proved was that cycling at half speed doesn't burn more fat afterward. It doesn't even say that cycling at half speed didn't burn more total calories afterward.

[zither]

This is aerobic exercise only. Of course there's no afterburn, your energy requirements during the activity were met. Once your heart rate comes down, that's it. You would only expect significant afterburn in anaerobic exercise, where your body must continue working after the fact to deal with all that lactic acid that was built up. I have no idea how much energy this requires , maybe it's not much (it's certainly not huge), but it wasn't addressed in this aerobic study at all.

[zither]

This is aerobic exercise only. Of course there's no afterburn, your energy requirements during the activity were met. Once your heart rate comes down, that's it. You would only expect significant afterburn in anaerobic exercise, where your body must continue working after the fact to deal with all that lactic acid that was built up (essentially you're working on an oxygen deficit that you have to pay back after the fact). I have no idea how much energy this requires, maybe it's not much (and I don't think it's huge), but it wasn't addressed in this aerobic study at all.

[Tiffany_P]

I thought it was already known that low intensity exercise doesn't create an afterburn. WTF?

[_gnasher_]

For some time, researchers have been finding that people who exercise don't necessarily lose weight.

The group lost an average of a little more than seven pounds, and many lost barely half that.

Nice contradiction.

[J.X]

Ahhhh, the fat-burning zone recommendations are coming back. This should sell some fitness equipment and make mediocre trainers happy again, as I am sure they will use this study to promote such a concept.

3 Easy Payments of $19.95 + Shipping

[amostofi1999]

I thought it was already known that low intensity exercise doesn't create an afterburn. WTF?

i was going to say the same thing. go do some hiit cardio late ate night and you will feel the afterburn when u go to bed. no need to waste so much time and money

[PickItUp]

No one concluded that exercising doesn't burn calories. The most interesting point ive found is that it seems that the 'after burn' effect where everyone claims you burn calories way after exercising is a myth.

I don't see how these results specifically attack the notion of after burn.

Again, their caloric intake was never monitored...all it said was that nothing changed in the diet. If they were already eating a 500 Cal per day surplus...then the exercise would be barely able to help them maintain.

[Blitz515]

of course they didnt loose wieght. They didnt change there eating habbits and were prob still stuffing there face with cheeseburgers

[~CoNkY~]

I thought it was already known that low intensity exercise doesn't create an afterburn. WTF?

^^^ this! Exactly, lift weights to get the 'afterburn', cardio's a waste of time....lift heavy to melt the fat away.

[cheeseandrice]

My research shows that 100% of people who burn 3500 calories lose weight.

i would +rep if i had any

[Obadiah!]

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But wait! There's more. Call now and...

[Il_Dago]

*yawn* and next week there will be another study saying that afterburn is the ONLY reason we lose fat.

[manicwebb]

So let me see if I understand this study...

Continuing to eat badly whilst doing only aerobic activity without reaching an aerobic heart rate doesn't work?



This scientific study brought to you by people who waste time by researching common sense.

[J.X]

of course they didnt loose wieght. They didnt change there eating habbits and were prob still stuffing there face with cheeseburgers

Yep! Excellent pt., no mention of what or amount of cals. they were consuming (and not to mention but eating "hobbits" is really fattening......

But wait! There's more. Call now and...

you will get not 1 but 2 Hobbits to Eat...........