Skipping rope 300 times, not much exercise, can be regarded as warm-up.

Pull-ups are mainly aimed at the muscles and strength of the back and arms, which can improve your comprehensive strength. There is an inverted triangle back muscle, but considering that you are thin, the inverted triangle is not too obvious.

Push-ups a day 100 times. If it is carried out continuously and intermittently, the pectoral muscles can still be significantly enlarged.

If you keep this intensity, the exercise effect will be strong after the body gradually adapts. It takes a week and a month to improve the strength to see better results.