During heavy exercise, we get cramps in the legs due to the accumulation of (ii) lactic acid
The cramps occur when muscle cells respire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps. Lactic acid build up can result in muscle pain, cramps , and muscular fatigue. These symptoms are typical during strenuous exercise and are not usually anything to worry about as the liver breaks down any excess lactate.
- Lactic acid is the by-product of anaerobic energy production and its accumulation in the muscles lowers the pH