Hi mahmud the reason to rotate the forearm outwardly (supination) is to maximise the shortening of the biceps. This reduces the stretch at the other end of the bicep (long head) which is one of the major forces keeping the joint out when in spasm.
@mahmudmusa636410 ай бұрын
Thanks for the reply I fear there’d be nerve damage if I mistakenly rotate the forearm inwardly(pronation) instead of outwardly(supination)