Q. Which is the chemical responsible for muscle fatigue?

A
Hydrochloric acid
B
Lactic acid
C
Amino acid
D
Citric acid
Solution:

It was once believed that lactic acid build-up was the cause of muscle fatigue. The assumption was lactic acid had a “pickling” effect on muscles, inhibiting their ability to contract. Though the impact of lactic acid on performance is now uncertain, it may assist or hinder muscle fatigue.

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