Question

During strenous exercise, which of the following change occurs?

• A. glucose is converted into glycogen
• B. starch is converted into glucose
• C. glucose is converted into pyruvic acid
• D. pyruvic acid is converted into lactic acid

Answer 1

Answer: (D)

pyruvic acid is converted into lactic acid

Answer 2

During severe/strenous exercise, the muscle fibres undergo anaerobic respiration where pyruvic acid in absence of adequate $O_{2}$ gets converted into lactic acid which on accumulation causes fatigue.