Lactic acid production in the skeletal muscle fibres results
state referred to as muscle fatigue. During cases of moderate exercise, fatigue is experienced after the muscle fibres use all the glycogen stores. During such moments, there is inadequate supply of oxygen. Consequently, muscle fibres use anaerobic respiration and pyruvic acid is turned into lactic acid. On the contrary, there is no aerobic metabolism in the mitochondrion. This is extremely vital since excessive accumulation of lactic acid results to extreme fatigue.
Lactic acid production in the skeletal muscle fibres results to increased hydrogen ions and reduced PH. A reduction of PH in the muscles hinders the performance of principal glycolytic enzymes, which reduces the level of ATP production. ATP is necessary for the active transportation of calcium. Therefore, a reduction in ATP results to loss of calcium, which consequently interferes with excitation- coupling in skeletal muscle fibres. During fatigue, there is accumulation of lactic acid that results from minimised supplies of ATP. This results to decelerated muscle excitation.
It is important that athletes understand the mechanisms involved in skeletal muscles. This ensures that their muscles remain strong and do not suffer from cramps, which may interfere with their performance. Prolonged training sessions assist in building strong muscles. In order to ensure adequate energy stores in the body, there is a need to consume energy rich foods. Exercise should be done frequently to ensure solid muscles. There are many benefits associated with exercise; improved motor skills, bone and muscle strength, fitness, and prevention of muscle diseases. A person can engage in anaerobic or aerobic respiration. Therefore, it is recommendable for athletes to engage in regular strenuous exercise
