In a moment of weakness (no pun intended) I thought about giving this thing a try, maybe altering it a tad due to being older than dirt.  Then the other day I managed to start a tear in my right rotator cuff.  No pushups now, I am just gonna try to hold off surgery as long as I can.  Damn, I don't want to do this again, it has the most painful post-op pain you can imagine...  
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OBG