Xue Sheng
All weight is underside
I know this is not the topic being discussed, but the above is wrong. It is not possible to apply full power at less than full speed. It is possible, however, to go full speed with no power.
A person may be able to apply more power by slowing down, because that person has not learned to integrate the proper end point timing at higher speeds, but full power requires full speed.
I have run across many people who fit into the above statement. But it is not that the block is too fast, or the punch is too fast, it is "operator error."
Actually without relaxation you can't have full power or full speed. And if you learn proper alignment and power flow you do not need full speed for full power.