Because dumbbell punching is a whole set of movements, whether you can exercise the relevant muscle groups depends on whether your movements are standardized.

Whether to use the pedal to drive the waist to rotate and send the shoulder to punch, the action should be done in one go.

If the action is correct, you will exercise the wrist, forearm muscles, brachiocephalic muscles, shoulder muscles, latissimus dorsi, psoas muscles, thighs and calves.

Another thing to note is that any fighting action involves a lot of muscles. It can't be said that that muscle can get full exercise by participating in the whole movement, and each muscle exercises in a different way. It depends on the purpose of your exercise, and then you can decide what action to use. You can ask if you need to. I hope my answer can help you and wish you good health.