During exercise, many organs need more oxygen and blood. The original heart contractility cannot provide enough blood and oxygen, so it can only increase the heartbeat to provide blood and oxygen.
During exercise, many organs need more oxygen and blood. The original cardiac contractility can not provide enough blood and oxygen, so we can only improve the heart beat to provide blood and oxygen<br>
During exercise, many organs need more oxygen and blood, and the original cardiac contractility can't provide enough blood and oxygen, so we can only increase the heartbeat to provide blood and oxygen.