well, youre loading up your quads and not your hammies..youre putting too much stress on knees.
quads will shorten, knees will start hurting. could lead to back problems, hip flexor issues..youre setting yourself up for a "lower crossed syndrome"
Man I just realized I got a lot weaker with chin ups. I'm nowhere near this explosive now. This was about a year and a half ago. These were prob 185BW+35 vs 190BW+25 now. One thing though is that rack had a 45 degree grip, which I absolutely loved. Now my grip is straight and I hate it.
Here is one from me. A bit old now, but I hurt my knee playing soccer not long after this and was out of action for a couple of months. Getting back up there now. I think I was weighing about 178lbs at the time of this vid. Not the greatest quality.