Doing pull-ups on gymnastic rings you can't generate torque with your shoulders against a bar. Instead the torque must be generated internally

calisthenics gymnastics gymnastics_rings

Does this sound like something you would like to do? Well, you have to login first so you can add it to your goals and we can help you become the kind of awesome person that could learn to do things like this. It's a free account, you can even login using Google or Facebook so you have one less password to remember. Just look at the menu in the upper left and click on where it says howdy stranger.

After you do the "Add to Goals" button below won't be greyed out anymore.