Key Takeaways The best time of day to work out is simply whenever you can be consistent about it. Whenever you can reliably execute your fitness routine day after day, week after week, is the right time for you. To establish a sustainable habit, make time for exercise in your schedule by blocking it off in your calendar and letting your family know about it. Waiting to "find time" to exercise will lead to other activities being prioritized, and you're likely to lose track of your routine.