A raft of evidence shows regular exercise helps you #Sleep better, and quality sleep makes it easier and more enjoyable to work out. One key to using exercise to help improve the quality of your sleep is making sure your body temperature has cooled down before heading to bed. This is because a drop in core body temperature signals to your brain that it’s time to sleep. Exercising in the morning or afternoon is ideal, then, as your body has the bulk of the day to cool down. But if evening workouts are a better fit for your schedule, it’s fine to exercise then. You just need to give yourself 60 to 90 minutes post-workout for your body temperature to lower before going to bed, said Dr. Sara E. Benjamin, medical director of the Johns Hopkins Center for Sleep and Wellness in Columbia, Maryland. If you don’t have that much time to spare for an evening cooldown, skip that vigorous run and try a gentle workout instead, such as tai chi or yoga. “Yoga before bed can be relaxing, and sometimes it’s good to move around before bed so you’re not as stiff and are more comfortable sleeping,” Benjamin said. cnn.com/2025/06/05/health..