According to licensed clinical psychologist and author of The Sleep Prescription Aric Prather, Ph.D., exercising at the same time every day is one of the best ways to do that. “[Physical activity] has been shown to be effective in maintaining people’s circadian rhythms, [and] doing physical activity, ideally, around the same time each day, will train your rhythm [and] allow you to make it more predictable for your body,” Prather explains on an episode of the mindbodygreen podcast.