i have very bad knees, probably almost bone on bone (no official dx or x-rays) and really aggravated them when i increased the weight on my squats so i had to stop for awhile and even cardio walking was difficult.
everything has since calmed down and i usually only have minor knee pain while walking but i was recommended patella straps which i got and used last night. i could tell that esp one of my knees track differently as it had kind of a weird painful (but not in a bad way) sensation while wearing the strap although i couldn't tell if they actually helped or not, i'll keep wearing them...anyone else use these?

