Background The aim of this study was to document the development of bilateral knee osteoarthritis over a 12 year period using a middle-aged population-based cohort with knee pain at inclusion.

Bilateral stimulation (BLS ... and alternate tapping your left and right knees with a slow rhythm. Take a few deep breaths while you do this. Or you can cross your arms in front of your chest ...

Previous investigations included laboratory tests, bilateral knee x-rays, and a left knee magnetic resonance image (MRI). Focused examination of the knees was negative for effusion or obvious ...