Quote Originally Posted by YouKnowWho View Post
You can use your heavy bag to "maintain" your iron palm ability. You can't use your heavy bag to "develop" your iron palm ability.

99% of the time that we won't need to use IP in our life. If we have to use, IP will come in handy. To strike on the head area, the palm will function better than a fist.
in our systems, (Hung Kuen and SPM) IP is used more for training power generation, rather than simply hardening the hand.
The structures of the hand are "hardened," as a result of the training, and are necessary to withstand the impact of your own strikes as they get stronger.
Otherwise, it is like having a solid glass hammer. You can only hit so hard with it before it breaks.