Something sounds wrong. I could understand some soreness of the back muscles, but not really the shoulder and wrists. Good swings come from relaxation of the these muscles and letting them respond to the movement of the larger muscles (i.e chest and back). I have had some pain the right forearm for a while - but this went away when I changed from stiff to regular shafts. I haven't seen your swing, but you may be tensing your grip and shoulder too much at address and throughout the swing.