>In my experience, it is all too easy to injure yourself, >perhaps permanently, even when there is NOT pain to warn you. Yes. That's the big problem. You can stran your self without realizing it. Soreness usually doesn't become noticable until a few hours after the strain occurs. If you do experience even minor pain during the exercise, then you may be in for some serious pain a few hours later that will be a long time in healing.