What happens if I exercise after eating?

Online Answer
It depends. For many people, exercising strenuously on a full stomach can lead to reflux, hiccups, nausea and vomiting, said Dr.
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While they myofibrals may not build up immediately, it's possible to gain much of the lean mass you got back through fluids in the muscle fibers soon after starting training again. Your endurance will come, but it takes longer. Of course, it will take more time the longer you go without exercise.
Glycogen Conversion Glycogen has to bind with water in order to fuel your muscles. As exercise becomes more routine over time, your muscles will become more efficient and need less glycogen to maintain your energy.
One of the main reasons why burning calories through exercise may still not result in weight loss is due to overexertion, or inflammation of your body. If you exercise too hard on a daily basis, there is an excess of inflammation in your body. All the added up inflammation makes you gain more weight than lose.
Most people who have difficulty losing weight are simply eating too many calories. An important factor in weight loss is how many calories you're eating versus how many calories you're burning. It may seem easy, but if you're not tracking your calories each day, you may be consuming more than you think.
Glycogen or sugar that your muscle cells convert to glucose is the energy source for your muscles. When you exercise regularly, your body stores more glycogen to fuel that exercise. Stored in water, glycogen has to bind with water as part of the process to fuel the muscle. That water adds a small amount of weight, too.