I've been hammering for about 3 years - small tools and useful hardware things mostly.
About 1 month ago I had the opportunity to participate in an iron smelt - that was a great experience.
BUT . . . I was given a hammer to work with that was way heavier than any of my own. After about 7-10 minutes as a striker, my arm was "toast".
Fortunately another fellow stepped in and finished the job.
That lead me to my question:
Is there a good description of good arm / body technique / stance that will prevent injury from repetitive actions? Are there execises that help build u