Everyone does have there own ways, and some of them are even productive, results oriented and backed by science while others are stuck in ritual and based on ideas a long time proven false.
The dumbbell punching has been tested and the results were clear: Speed was not increased; only the perception of speed, and technique broke down. The resistance is on the vertical plane when the action is horizontal; that changes the motor recruitment and degrades coordination when the dumbbell is not used. i.e. performance actually suffers. The only way to use the dumbbell without degrading performance is to lay on an incline bench. And realize that one isn’t going to get faster doing it, only more powerful. Speed comes from repetition of the actual skill, not from resistance… Did you even read my previous post?
Man, I?ve been in the MA biz a long time and I can say from experience, martial artists are one of the slowest groups to actually use the science that other athletes have benefited by for years… sad really.
Your opinion is fine, but results are what matters.