Simply press your two knuckles into the makiwara.
Start with a relaxed arm...ensure your alignment is correct. Then slowly press into the makiwara allowing only the muscles necessary for the movement to contract...do not tense anything...the muscles that need to do the work will naturally tense and that is fine...but don't squeeze your hand, raise your shoulder, hold your breath, or strain.
This develops strength in the areas necessary for a fast, strong punch...it teaches you how not to work against yourself...and this is where you should start your makiwara training. Once you can do several repetitions of this, move up to slow strikes that stick to the makiwara...again focus on the proper alignment and feel of the technique...then move up to faster techniques...eventually you will be hitting it full power and speed...
A makiwara should have some give to it...also, you should use a good quality piece of wood (cedar, for instance) because a cheap grade of pine will eventually break at the base once you really start wailing on it.
:asian:
chufeng