Running five times a day and squatting on the seventh floor will make your thighs explosive and aggressive? I'm a resident, and I can't afford to go to the gym or anything. If I go home once a week, ... Yes, you can. Yes, you can. It's just that you should pay attention to the method. It's best to jump on one leg when running stairs. The limit of your jump. Like jumping five stairs at a time. When you are tired, you can change jumps and practice squats. Pay attention to slow down and use your fastest speed when you get up. It is best to practice squatting with your left and right legs.