Question

why does muscle fatigue occurs after rigorous
exercise​

Answer 1

Answer:

When you perform a rigorous exercise, your body muscles get strained due to lack of energy which is prepared when you have oxygen...

Hence, to give you energy, your cells perform anaerobic respiration which produces energy in little quantities and also lactic acid. This lactic acid is responsible for muscle fatigue.

Answer 2

●It is present in low levels in the muscle.

● Glycolysis converts glucose to pyruvate, water and NADH, producing two molecules of ATP.

● Excess pyruvate is converted to lactic acid which causes muscle fatigue.

I am written point wise you can also write in point wise or paragraph wise ok....