Im doing p90x, on day 1 of my 3rd week, at the start I could not do a single push-up without doing them on my knees. Now I can only do 3 normal push-ups and then I need to do the rest on my knees (pathetic, I know). Are push-ups on your knees still good if you still feel the burn? Also, are pull-ups still good aswell if you use a chair to support you?
Thanks :)