I need some help with my lead hook. I have set up a camera and I have filmed my lead hook. I am 100% happy with the technique. I pivot my feet correctly, I rotate my hips 90 degrees, I drive hard toward my target with my hips then I uncork my shoulders with my left arm bent at 90 degrees and deliver my shot with my first 2 knuckles. I have look at it over and over again and it looks and feels 100% correct.
What I need help with though is that I still generate more power with an arm punch, not using my body, with my lag hook. My lag hook has a great "snap" to it and when I throw it on a heavy bag or on mitts you can hear and see the power but nothing close to it on my lead hook. Furthermore, when I throw my lead hook I experience pain in my first 2 knuckles, elbow and anterior deltoid.
Please can anyone give me their opinion on what I may be doing wrong and what I can do to increase power on the hook,