 [ Symptoms ] as a teen what time of day should i exercise [ Disease ] as you start an aerobic exercise program it is important to find the right time to exercise    a time when you feel alert and energetic this helps to make the exercise more fun and even easier you may be a morning person and enjoy using a stationary bike before school or if you are barely awake at 6 a m hit the track running at lunchtime during pe or after school maybe swimming is what you love so enjoy de stressing while swimming laps on your school is team