During heavy exercise, we get cramps in the legs due to the accumulation of

The correct answer is Lactic acid.

Key Points

• During heavy exercise, the demand for energy is high but the supply of oxygen to produce energy is limited.
• Therefore, anaerobic respiration takes place in the muscles cells to fulfill the demand for energy.
• This anaerobic breakdown of glucose leads to the formation of lactic acid in muscles.
• The accumulation of lactic acid in muscles leads to muscle cramps.
• Hence During heavy exercise, we get cramps in the legs due to the accumulation of Lactic acid.
• So, the correct answer is 'Lactic acid'.