[Burner]

If a hitter uses the "karate straight arm punch - heel of hand" as the image for his right hand thrust delivery function then it is a given that this procedure is one of bending and straightening of the right arm.

Bending is a job for the Biceps and straightening provides work for the Triceps.

The the workings of the forearm, independent of this bending and straightening process, are jobs for other departments.