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doug boardley
mountain biking is really good for your knees Joe, good aerobic and minimal impact excecise, (Doc's words, not mine:smilewinkgrin🙂very sorry to read this Doug,thats tough.
i'm only tiling near 5 years now and have been using alpros at least half that time,knees are good so far.I'm getting more involved in mountain biking and hope this doesn't affect me badly,i'm even heading to scotland with my bike saturday week.