is an important part of keeping a healthy lifestyle, and regular exercise will help you sleep better each night. However, the timing of that exercise is important to ensure the optimal effect on your sleep schedule. The best time to engage in exercise that will improve sleep is in the afternoon. If you have to exercise at a different time, it is still effective but be sure to always complete your exercise at least two hours before you go to sleep. Otherwise, strenuous exercise before sleep will decrease your ability to fall asleep.