Answer: Two possible ways are aerobic respiration and anaerobic respiration.
Explanation:
Aerobic respiration: During aerobic respiration, the muscles of the body during vigorous exercise experience lack of oxygen as a result heart pumps faster to avail the necessary blood volume of oxygenated blood to all the muscles.
Anaerobic respiration: In the absence of oxygen the glucose stored in muscles is converted into lactic acid and this process avails energy for performing work but also causes cramps in muscles.
