There are many reasons why people add amino acid supplements to their fitness routine. As a mid-workout supplement, they can maintain energy levels and reduce fatigue. As a post-workout supplement, amino acids aid in body’s recovery process and reducing muscle soreness. Whatever your personal health and fitness goals, amino acids can be a valuable tool for success. What Causes Muscle Fatigue During Exercise? Fatigue – that full-body feeling of low energy that makes you sigh...