I have tendonitis on my knee. It just started last week and haven't had a chance to see my MD yet but I'm pretty sure it's just that. Anyway, I often hear that cycling is actually a good exercise for knee injuries. Is ther any truth to that or should I avoid it? I'm trying to stay off my feet for now, taking 600 mg ibuprofen and icing my knee. I was on the trainer yesterday and the knee felt great afterwards but this morning it hurts.