Leucine, valine, and isoleucine, the branched-chain amino acids (BCAAs) from muscle oxidize in energy metabolism during physical activity, making them play important roles during activities of short duration like 25 yard swims or 10-minute walks performed comfortably.

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Leucine, valine, and isoleucine are indeed branched-chain amino acids (BCAAs) that play important roles in energy metabolism during physical activity. However, their primary benefits are more pronounced during prolonged or intense exercise rather than short-duration, low-intensity activities. BCAAs help delay fatigue and improve exercise performance, particularly in endurance sports or activities.

Leucine, Valine, and Isoleucine, the Branched-Chain Amino Acids (BCAAs) from Muscle