: Strength biceps-triceps How can be produced a powerful punch.What muscles needs? I workout biceps and triceps,does this play a role or is clearly about technique.What should I improve?

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Muscles contract when they do work.

If you contract your bicep you perform a pulling motion, for triceps it is a pushing. For a punch you will be pushing, so triceps.

However, chest/pectoral strength plays a important part in the pushing motion of a punch.

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It's been a number of years since I've studied any form of striking art, but from what I remember, it's mainly technique followed by a surprising amount of the core / trunk and lower body.

For example, one study of 100+ amateur boxers (conducted by Filiminov) used tensiometric dynamometers to determine the origin and nature of punching power. Their findings concluded that almost 40% of the power from a punch is produced by the lower body. As much as 38 percent is associated with trunk rotation. Their research confirmed that the initiation of a punch starts at the ground (feet) and travels up the legs through the hips (multiplying in force).

Taken from here.