Why do we feel fatigue after a strenuous exercise or after a long walk?

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Why do we feel fatigue after a strenuous exercise or after a long walk?

Feeling fatigue after a strenuous exercise or after a long walk is a normal physiological response of the body. There are several reasons why this happens:

Depletion of energy stores: During exercise, the body uses energy stored in the muscles in the form of glycogen to produce ATP (adenosine triphosphate), which is the energy currency of the body. As the glycogen stores get depleted, the body starts feeling fatigued.

Build-up of metabolic waste: During exercise, the muscles produce metabolic waste products such as lactic acid, which can accumulate and cause fatigue.

Muscle damage: Strenuous exercise can cause microscopic damage to the muscle fibers, which can lead to inflammation and soreness. This can also contribute to fatigue.

Dehydration: When we exercise, we lose fluids through sweat. If we don't drink enough water to replace the lost fluids, we can become dehydrated, which can cause fatigue.

Electrolyte imbalances: Electrolytes such as sodium, potassium, and magnesium are essential for muscle function. During exercise, we can lose these electrolytes through sweat, and if we don't replace them, it can lead to fatigue.

Overuse of muscles: If we overuse certain muscles during exercise or walk, they can become fatigued and cause overall fatigue in the body.

Lack of oxygen: During exercise, the body needs more oxygen to produce ATP. If we don't breathe deeply enough or if our cardiovascular system is not efficient, it can lead to a lack of oxygen and fatigue.

Therefore, it is important to rest and recover after strenuous exercise or long walk to allow the body to replenish energy stores, repair muscle damage, and restore electrolyte balance. Drinking plenty of water and eating a balanced diet can also help in recovery.

Answer

Due to the formation of Lactic acid in muscles...

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