First, understand the role of branched-chain amino acids. BCAAS promotes the synthesis of muscle protein and reduces the decomposition of muscle as an energy source. BCAAS can also prevent brain cells of patients with liver disease, delayed self-occupation exercise (or anorexia) from sending wrong messages. Many athletes taking BCAAS can strengthen their performance and reduce muscle breakdown during strenuous exercise.

For strenuous exercise, it generally refers to excessive aerobic exercise or anaerobic exercise. At the beginning of fitness, novices don't exercise much, and their bodies can't achieve enough aerobic consumption. Of course, anaerobic resistance training is also a familiar movement, they have mastered the essentials, there will be no heavy load, and the demand for branched-chain amino acids can be ignored.

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