Those who passed the police exam, or the PE teacher came in to teach how to improve the pull-ups. I am very grateful! You can get extra points for a good answer!

You can go to the gym or some sports schools for training. However, push-ups have no effect on pull-ups. Push-ups are triceps brachii and pectoralis major, and pull-ups are biceps brachii and latissimus dorsi.

Pull-ups must first learn how to use strength. If your biceps are strong or you want to practice, choose backhand and put your hands closer. If your deltoid and latissimus dorsi are strong or you want to practice, choose the forehand. It's usually backhand. It's easier

As for how to use strength, it is very important to inhale when pulling and exhale when putting down, and to tighten the whole body, relax the lower body and straighten your arms. This is the standard. When you do it, you should concentrate, hold your chest out, and rest for 3 minutes every time you have no strength. Do more groups a day, and it's best to take a day off.

Before doing it, you can listen to some music and do some aerobic exercise, such as running 400 meters. This is very important.

Drink more milk and food from protein.

If you really can't reach Grade 7 in the end, and your exam is not very strict. Then choose leisure (swing), hang your body on the horizontal bar, and then swing back and forth: abdomen, abdomen, straighten your legs, abdomen when it is large, swing your head and upper body up, then directly abdomen, swing your head and upper body up. .....

This is a lazy man who doesn't practice any arm strength, which is inertia. I hope you can accept my suggestion.