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Question

Muscle fatigue occurs due to


A

Shortage of substrates

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B

Lack of exercise

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C

Overwork

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D

All of the above

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Solution

The correct option is D

All of the above


Substrate shortage is one of the causes of metabolic fatigue. Substrates are depleted during exercise, resulting in a lack of intracellular energy sources for muscle contractions. In essence, the muscle stops contracting because it lacks the energy to do so.
Fatigue is a feeling of tiredness or exhaustion or a need to rest because of lack of energy or strength. Fatigue may result from overwork, poor sleep, worry, boredom, or lack of exercise.


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