To eat or not to eat (before exercising): That is the question

[Anzel]

April 6, 2017
Source:
American Physiological Society (APS)
Summary:
Exercise enthusiasts often wonder whether it’s better to eat or fast before a workout. A new study is the first of its kind to show the effects of eating versus fasting on gene expression in adipose (fat) tissue in response to exercise. This difference highlights the different roles fat plays in powering and responding to exercise.

FULL STORY
Exercise enthusiasts often wonder whether it's better to eat or fast before a workout. A new study is the first of its kind to show the effects of eating versus fasting on gene expression in adipose (fat) tissue in response to exercise. This study highlights the different roles fat plays in powering and responding to exercise. The study is published ahead of print in the American Journal of Physiology -- Endocrinology and Metabolism.

Researchers from the University of Bath in the U.K. studied a group of overweight males. The volunteers walked for 60 minutes at 60 percent maximum oxygen consumption on an empty stomach and, on another occasion, two hours after consuming a high-calorie carbohydrate-rich breakfast. The research team took multiple blood samples after eating or fasting and after exercising. The researchers also collected adipose tissue samples immediately before and one hour after walking.

Gene expression in the adipose tissue differed significantly in the two trials. The expression of two genes, PDK4 and HSL, increased when the men fasted and exercised and decreased when they ate before exercising. The rise in PDK4 likely indicates that stored fat was used to fuel metabolism during exercise instead of carbohydrates from the recent meal. HSL typically increases when adipose tissue uses stored energy to support increased activity, such as during exercise, explained Dylan Thompson, corresponding author of the study.

These results reinforce the view that "adipose tissue often faces competing challenges," Thompson wrote. After eating, adipose tissue "is busy responding to the meal and a bout of exercise at this time will not stimulate the same [beneficial] changes in adipose tissue. This means that exercise in a fasted state might provoke more favorable changes in adipose tissue, and this could be beneficial for health in the long term," he noted.


Story Source:

Materials provided by American Physiological Society (APS). Note: Content may be edited for style and length.

Journal Reference:

Yung-Chih Chen, Rebecca L. Travers, Jean-Philippe Walhin, Javier T. Gonzalez, Francoise Koumanov, James A. Betts, Dylan Thompson. FEEDING INFLUENCES ADIPOSE TISSUE RESPONSES TO EXERCISE IN OVERWEIGHT MEN. American Journal of Physiology - Endocrinology And Metabolism, 2017; ajpendo.00006.2017 DOI: 10.1152/ajpendo.00006.2017
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American Physiological Society (APS). "To eat or not to eat (before exercising): That is the question." ScienceDaily. ScienceDaily, 6 April 2017. <www.sciencedaily.com/releases/2017/04/170406152651.htm>.

Enjoy your day!

Anzel
Puritysourcelabs.ru
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[Jay0536]

Being that I get up at 4:30am to head to the gym by 5:00am I usually have a banana and a pre workout drink. Then after my workout I usually have 5 eggs and a half cup of cottage cheese. I always wondered what the difference between eating before or after your workout would be. I hope I've been doing it right!!


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[Anzel]

Being that I get up at 4:30am to head to the gym by 5:00am I usually have a banana and a pre workout drink. Then after my workout I usually have 5 eggs and a half cup of cottage cheese. I always wondered what the difference between eating before or after your workout would be. I hope I've been doing it right!!


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Yeah that's the thing.... look what it says.. on the days they ate food they were given "high calorie carbohydrate rich meal "
I would like to know what that meal looked like. Cause if it was a stack of waffles with syrup I can see how that can affect fat burning negatively.

Now you have a banana and a pro drink. Thats like 200 cals and combining protein with carbs and of course the fiber in the banana slows carb metabolism.... that may not really make a difference .

Anzel
Euro-Pharmacies.net Puritysourcelabs.ru

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[EJR]

Fasted cardio for sure. I've tried fasted weight training, I guess it's OK if you're not planning on training with a great deal of intensity. I seem to do well with oats and whey 2 hours before training as well as sipping a homemade pre/intra workout shake starting an hour before.

[jsnm]

I'm with Jay,up at 4:30,shake with a cup of egg whites,50g carbs and glutamine then I workout,drink the same after and eat a full meal within an hour.
I just can't wake up that early and eat a huge meal and my schedule doesn't let anything else work for me.
Has worked good so far but I know I have more potential I wish I could dial in.


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[Mjlaurie]

That sees to be what everyone is saying. I just watched an enhanced athlete video and they were saying the same thing about fasted training. I just switched it up myself, I'm trying to loose that stubborn fat before my coming show. We will have to see what happens, the shitty part is for every article like the one above there is another article saying the exact opposite.