Thank you so much for taking the trouble to write this. My knees are now swollen. It never would have occurred to me to connect this with the hyperextension if it hadn't been for your post, but I think that's exactly what's causing the problem. I am trying to get to a PT--waiting for the referral--and meanwhile trying to do what I can to go easy on my knees. Maybe the PT will give me braces, as someone else mentioned here.

Abby