It is best to do exercise in the morning if possible, but keep warm! If conditions do not allow, try to fix the exercise time at the same time every day or a few days a week. If you do fitness activities, you can look at your hobbies. If you have no special hobbies, you can try a variety of fitness activities at first, such as aerobics, yoga, pilates, rock climbing, tennis, badminton, cycling and so on.