With regards to shoulder turn on the 1-handed backhand.
Ok, so, i had a really odd training session today. My coach and i have been at work returning my backhand to it's former glory, but now i'm going absolutely bonkers. Basically, i can't seem to keep my shoulders from turning through the shot, and it's very obvious that this keeps me from hitting wicked topspin. Essentially what my coach wants me to do is swing the racquet solely by stretching the deltoid, which i can't do fast enough to go for winners, or even just medium paced shots. If i try to do so, my shoulder starts turning involuntarily and immediately!
I'm considering 2 things: A: bulk up my deltoid at the gym until i can actually hit hard using the technique he is teaching me and/or B: Strap my shoulder with sports tape so that it can't turn, and hit only backhands, until this becomes natural. So please, to you pros and coaches out there, does this sound like it might help?
P.S: I do not have access to a ball machine, so just hitting a gazillion balls isn't an option.