Have had an Sole F80 for about 4-5 years now and recently I've noticed when I run on the treadmill my knees and back have really started hurting. I suspect it's possibly the cushioning, deck, or belt on my treadmill. It just doesn't feel right to me. I lubricate the deck pretty often.
I've taken some pics, if anyone could check them out or give me some ideas that would be great.
Here are the pics: https://1drv.ms/f/s!AkKgCFZQj_Ofg44AYRwv1OxIdNFlTA