A core truth of circadian biology is that if you exercise at the right time in your circad

Well SupportedExercising early in the day, within an hour of waking and no later than three hours after waking, can increase energy levels and bias individuals towards action.

Well SupportedIdeal workout timing may be around three hours after waking or eleven hours after waking.

Partially SupportedExercising at the correct time in one's circadian (temperature) cycle leads to more energy throughout the day, while exercising at the wrong time can cause a significant energy crash.