MUSCLE PHYSIOLOGY

PHYSIOLOGY

MUSCLE FATIGUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What causes muscle fatigue?
A
build up of lactic acids inside the muscles
B
Drinking too much water
C
Eating too much
D
Not moving
Explanation: 

Detailed explanation-1: -Lactic acid is formed and accumulated in the muscle under conditions of high energy demand, rapid fluctuations of the energy requirement and insufficient supply of O2. During intense exercise sustained to fatigue muscle pH decreases to about 6.4-6.6.

Detailed explanation-2: -Lactic acid is a byproduct of anaerobic metabolism, in which the body produces energy without using oxygen. Since the discovery of lactic acid, the popular notion has been that it is responsible for muscle fatigue and also tissue damage induced by the lactic acid following an intense workout.

Detailed explanation-3: -Lactic acid is mainly produced in muscle cells and red blood cells. It forms when the body breaks down carbohydrates to use for energy when oxygen levels are low. Times when your body’s oxygen level might drop include: During intense exercise.

Detailed explanation-4: -Improper exercise, long time combat, military training and some related diseases (for example, cancer and stroke) can cause muscle fatigue, which negatively affects athletic achievement, military combat ability and patient recovery.

Detailed explanation-5: -When this increased acid builds, the muscles get tired and may not be able to contract as effectively. Some people may notice a burning sensation in the muscle during exercise. “Interestingly, some experts believe the production of lactate actually helps the muscles delay fatigue during intense exercise, ‘’ says Carroll.

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