So any strength and power exercises that will increase my hips rotational strength speed and power or torque.
Move your body with your punches. Don't punch with your arms, punch with your body. Do this over and over and eventually you'll develop improved power punching. Then, after that, you'll have to learn when to use it. Throwing power shots every punch will wear you out and make you a dead fish/slow you down/is less effective. Need to mix things up
