In fact, it is not as difficult as you think! Mainly lies in a problem of persistence! First of all, eat less and eat more! Physical fitness, endurance and explosiveness can be practiced by skipping rope, long-distance running and fast running! When you do push-ups, you are actually practicing strength and explosiveness! But not fast! Just one in three seconds! You can't just practice one ... multi-faceted development! All the muscles of the body should be practiced at the same time! Otherwise it won't work! It's also easy to get out of shape! I am a student, too. That's how I practice! But it would be better to go to the gym to find a professional coach! O(∩_∩)O~