Saw a guy tie an elastic band to the squat rack about shoulder high, wrap the other end around his wrist and do something like a rear delt exercise. His arm was straight out to the side at 90deg to his toso, elbow bent at 90 and forearm pioting straight up (like a cactus growing in Mexico).
Then he would move the forearm backwards to stretch the elastic, all the movement was b/w the hand & elbow, no arm or shoulder looked involved.
Been trying to figure what it is for, looks and feels very uncomforable in the shoulder, short movement, almost looked like a 70s dance move rather then a strength execise.
Anyone know whats it all about?
Is it injury specific?
Is it specific to a sport discipline?
Anyone else seen it?
Has me stumped.