MUSCLE PHYSIOLOGY

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 Buildup Causes Muscle Fatigue and Soreness. Anyone who has pushed themselves through an intense workout will be familiar with “feeling the burn”-that sensation of fatigue and pain that sets in when you subject your muscles to lifting heavy loads repeatedly or sprinting all-out.

Detailed explanation-3: -Intracellular acidosis due mainly to lactic acid accumulation has been regarded as the most important cause of skeletal muscle fatigue. Recent studies on mammalian muscle, however, show little direct effect of acidosis on muscle function at physiological temperatures.

Detailed explanation-4: -As this acid is produced the body tries to remove it by converting it to lactate, but this process is not as fast as the acid production and when acid builds up it burns. It is the acidic build up of Hydrogen ions in the muscle that causes fatigue and slows the enzymes required for this system.

Detailed explanation-5: -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.