Question

Give scientific reasons:
We feel tired after exercise.

Hint:

Tiredness after exercise is a normal result of energy depletion and the build-up of waste products like lactic acid.

Answer 1

1. Energy Depletion: During exercise, the body uses energy stored in muscles, primarily in the form of glycogen. After prolonged or intense exercise, these energy reserves are depleted, leading to fatigue and a feeling of tiredness.
   
2. Lactic Acid Build-up: During vigorous exercise, especially anaerobic exercise, the body produces lactic acid as a byproduct. The accumulation of lactic acid in muscles contributes to muscle fatigue and soreness, making us feel tired.
   
3. Increased Oxygen Demand: After exercise, the body requires more oxygen to recover. The elevated heart rate and breathing rate are part of this recovery process, contributing to the feeling of tiredness as the body works to restore balance.