youdao

So doing an hour of cardio training per day will eventually lead to stagnation as the person's body becomes adapted to that one hour of low-intensity exercise demand.

因此，每天进行一小时心血管训练，随着他的身体逐渐适应那一小时低强度训练，最终，训练效果将停滞不前。

youdao

youdao

By alternating high- and low-intensity exercise during the same workout, you are able to exercise at a higher overall average intensity, burn more calories and improve fitness.

CNN: Is a shorter but harder workout better?