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Exercise releases a substance called ______ into your blood stream. Question 4 options: Lactic Acid Pyruvic Acid Acid Reflux

User Tobalr
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Lactic Acid.

During exercise your muscles produce lactic acid. It's a metabolic byproduct that makes no contribution to exercise performance. It causes muscle fatigue and post-exercise muscle soreness.

User Tomi Aarnio
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