Great Article! I believe strength of a punch (or kick) doesnt' just depend on form itself, but also physical power. I've been trying to put on mass like crazy, but it's really difficult (and expensive) because i happen to be vegetarian, so I have a naturally smaller build. To that end, I can attest that when I kick the bag with the correct form, and then my sempai kicks the bag, the difference in power is sometimes overwhelming. My sempai, is, of course, at least 15 kgs heavier than I am. However, I have learnt that muscles too big and bulky restrict movement. I had a scenario where I was trying to get one of the juniors to do a normal punch. (The guy was huge) Scenario : Me : "When you punch, rub your knuckles against your ribs. This generates more direct power." Huge Junior : "Okay." Me : "....." Huge Junior : "Hey, why can't I do it?" Me : "I think your wing muscles are in the way." He walked with his arms stuck out of him at a constant 30 degree due to his wing muscles, so obviously it was impossible to 'rub against his ribs'. He did, however, have a hook (which is illegal in Karate) which stung like a mule's kick.