Thanks for the intel. With titanium knees I have to be smart on impact. My resting BPM is just under 60 or dead nuts on sixty on any given day. Today was my first day monitoring BPM in cardio workout. I stayed right at 110 which I felt was low but really did not know? I am trying to be smart and not be my normal must be extreme self. When I get frustrated lifting and decide F it I am doing more weight I simply strip the bar and walk away. If I stay I will succumb to my ego, then sure as the world I will be purchasing another shoulder. Ego or vanity not sure which it is, but it is darn sure dangerous!