In my hse gym there is this machine 4 ya quadriceps, the standard ones where u kick them to work out. However, by now, I am kicking up about 60kg[With both legs]. Also, I m merely a 120 pounder. The problem is that the front of my shins r beginning to hurt. Perhaps I hav a sharper shin, but I cant see how I can increase the weights with the pain. Any solutions?