Do you personally punch harder with bent arms compared to extended? [Video]

I talked to a karate fighter who participated in a study in which the karatekas had higher punch output when their straight punch arm was bent compared to extended. This was a surprise to them.

Could it be that there’s greater bicep engagement when the arm is bent compared to straightened out? Also perhaps stronger wrist support at the point of impact?

What are you meaning when you say straightened versus bent? I don’t think anyone would recommend landing a punch with it already 100% extended. But also wouldn’t land a punch from chamber.

What are you meaning when …