It achieves those purposes with practical training. Just learning to hit properly is the difference between a love pat and a bone-crushing blow. The class paired up, half using boxer's practice mitts. Maloney demonstrated a straight punch, no windup nor swoop, just a straight jab right from your chin to the mitt. Let your punch lead you in, snort and push out on your stomach muscles as the blow lands.
Proper breathing amplifies the power of the punch.
I thought I was doing pretty well. I did what he said to do but understanding what he said and doing it isn't the same. Jim wasn't pleased with my performance. It takes the watchful eye of a qualified instructor when you are learning such a psycho-motor skill as this. When Maloney explained my mistakes, it made all the difference in the world.