You get cramps after participating in a 400" " m race. Which option best explains the reason for the same?

Correct option is D

The correct answer is (D) Lack of oxygen and pyruvate converted to lactic acid

Explanation:

• During high-intensity activities like a 400-meter race, the muscles require more oxygen than what can be supplied through normal breathing.
• When oxygen supply is insufficient, the body switches to anaerobic metabolism, where pyruvate (produced during glucose breakdown) is converted into lactic acid.
• The accumulation of lactic acid in the muscles can lead to muscle fatigue and cramping.