I had MRI & Xray in March-2018. MRI shows Left knee has moderate to severe OA medial compartment without marrow edema. Right knee has moderate medial compartment OA without marrow edema. Both knees have degenerative tear medial meniscus. 

I also have Chinese TCM Moxibustion treatment (7 1-hour sessions) in 2018-19. For a while, the pain on my left and right knees were much less. But after I started to play Table Tennis twice weekly for 2-3 hours in Mar-2019, the pain returned and slowly deteriorated. 

Now due to pain, I stop my walking exercise since June 2020