Question

why does anerobic respiration takes place in our muscles sometimes?​

Answer 1

Answer:

While doing heavy exercise such as running, cycling, weightlifting, etc., we need high energy which creates an impermanent deficiency of oxygen in the muscle cells. In absence of oxygen, our body performs anaerobic respiration in which glucose present in the muscle cells is changed into lactic acid.

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Answer 2

Answer: When we do heavy exercise such as running, our body needs more energy. To get more energy the body performs anaerobic respiration.

Explanation: Anaerobic respiration is done by turning glucose into lactic acid and a small amount of energy.