Hey m8 Im gunna give you the same advice that I was given way back. Focus on your technique!!! I don't know what your physical condition is like, but if you don't have your form down all the muscle in the world isnt going to make a difference. So get a heavy bag and start hitting. Control your kicks and punches and remember your power comes from your "core". In other world the rotation of your body generated by your abs, back, and hips. Once you get that down you can start going at it faster. Give it a few weeks and you will notice a huge difference. Check out youtube for videos on how to properly throw the strikes. Good luck m8.