Row Correctly on the Erg

I am now regularly back on the erg to minimize the 'bathing ring' I have around my waist (where did it come from?). I normally do these workouts at the local YMCA which recently got brand new rowing machines. I am not at all an expert on rowing on the erg, but it hurts to see my fellow, non-rowers at the Y massacre themselves and the rowing machines by going back and forth just pulling and pulling on the handle, with their knees bent or straight at the wrong time in the rowing cycle. I want to call out: 'Hold on, Sir/Madam, but please stop before you really hurt yourself' - but, of course, I say nothing.

Above is a great step-by-step rowing the erg video with coach Lubo Kisiov of Thames Rowing Club which will help both beginners and more advanced rowers to row correctly on the erg. Good luck!