It depends on the purpose of your exercise. If you have long muscles, you can't exercise well every day. And the fitness time should not be too long. For the exercise to increase muscle circumference, it is mainly to do great strength exercises, so it should not be too long.

If the purpose is to lose weight, it is necessary to have aerobic contact for more than 30 minutes at a time. If you don't feel tired the next day, it's no problem to practice every day. The key depends on your own physical condition. But do it at least three days a week.