. Why we get muscle cramps after heavy exercise?
During heavy exercise the demand for energy is high. But the supply of oxygen to produce energy is limited. Then anaerobic respiration takes place in themuscle cells to fulfill the demand of energy.
Glucose in absence of oxygen > Lactic Acid + Energy
The cramps occur only when the muscle cells respire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causesmuscle cramps.