I have always had knees problems. Both of them. My OA's status is currently at stage 4. Irreparable. Surgery may only be the last option.
I recently purchased a pair of Cho-pat dual knee strap. I have used them several times now. They are the best knee support gears in the market today. I append Cho-pat's write up in their product information sheet given in the company's website:
Cho-Pat’s newly patented Dual Action Knee Strap provides an extra dimension of relief for painful and weakened knees.
The strap applies pressure upon the patellar tendon below the kneecap to stabilize and tighten up the kneecap mechanism, which improves patellar tracking and elevation and reduces patellar subluxation. It adds further strengthening to the kneecap mechanism by applying pressure on the tendon above the kneecap as well. This tends to reduce the forces of the quadriceps on the patella tendon and erosion of the undersurface of the kneecap due to a possible misalignment of the quadriceps (Q angle).
The device’s design and construction apply constant dynamic forces to the surrounding areas of the knee reducing the likelihood of overuse syndromes. At the same time, the strap allows for full mobility while providing maximum benefits.
I fully recommend all runners to use these knee straps. It does not matter whether you have knee problems or not. These are real knee support for running.