Board Thread:Speculation House/@comment-10380701-20141011082048/@comment-27043602-20151028131543

ChishioKunrin wrote: Basically, what Ren, Fox, and perhaps Arslan did is kinda like those martial arts styles where the people who practice it''' say that you are channeling your chi into your hand. It's things like that, that supposedly make the one inch punch possible. '''You're not just hitting them with your hand, you're also hitting them with the force of your chi. Or something. Actually, Bruce Lee's famous "One-inch Punch" is a result of the application of Wing Chun's "Economy of movement" principle.

(Source: https://youtu.be/7ic3Y9Jh3VE?t=6m50s)

Though I do agree that channeling one's inner energy through proper body dynamics is what makes such a punch possible. As I made mention earlier, I have a Black Belt in Kyokushin Karate, and something we're always reminded to do when punching and/or kicking is to "Put our hips into it", thus maximizing the energy to be transferred into the desired target.

As such, it's completely possible for someone who isn't a so-called "heavy lifter" to dish out a 'powerful'  punch, through proper application of body dynamics/strength channeling in combat.

For example: Iron Fist/Danny Rand, according to the Marvel Strength Scale, can only lift a maximum of 750 lbs (even with Chi enhancement); he is outclassed by the likes of Peter Parker/Spider-man whose maximum strength limit peaks at 20 TONS.

(Source: http://marvel.wikia.com/wiki/Strength_Scale)

HOWEVER; it's still very much possible for Danny Rand to do something like THIS via proper channeling of Chi: http://static.comicvine.com/uploads/original/11111/111119260/4089631-3871089-0816589499-38227.jpg