Yeah some studies show exercise in a fasted state increases adrenaline and human growth hormone production, so it's kind of like getting natural steroids. :) It also helps train your muscles to burn fat for energy which is great for endurance (you have far more fat in your body vs. sugar for energy). Great info here: https://intensivedietarymanagement.com/fasting-and-exercise-... and http://leangains.com/
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