Understanding the Science Behind Muscle Fatigue

Muscle fatigue is always an experience when engaging in physical activity. If you are an athlete in training for a marathon or one who simply likes a casual jog, you have always experienced this phenomenon. What is muscle fatigue, and why does it occur? Understanding the science behind muscle fatigue will enable you to manage muscle fatigue better and improve your performance as well. This blog will show you the causes and symptoms and how to counteract muscle fatigue successfully.

Physiology of Muscle Fatigue
It occurs at the level of muscle fibres where energy production and muscle function, in general, are impaired. For energy production during exercise, the primary form is adenosine triphosphate (ATP), from which the rest of the ATP comes through its cycling secondary to increasing need within muscle cells. The body produces ATP both aerobically and anaerobically.

Energy Exhaustion: Muscle cells, when they are subjected to intense exercise, consume their stored energy reserves very rapidly. When their ATP content falls, contractions are weaker, and fatigue sets in.

Accumulation of Lactic Acid: When subjected to very high-intensity exercise, the body switches over to anaerobic metabolism, and lactic acid is deposited in the muscles. Although lactic acid contributes little or nothing to the sensations of fatigue, its accumulation adds to the fatigue and soreness.

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