Very timely thread. As a 66 year old with better then deserved health I have been experiencing a lot of pain in left hip for the last few months. Visit to doctor confirmed my suspicions of arthiritis and was basically told nothing can be done until it gets worse. Doc told me to keep riding the bike but no more running. Most frustrating thing is difficulty putting on sock and tying shoe laces on left foot due to range of motion loss. Does not bother me in normal activities such as walking or riding the bike. If I don't ride for a few days it really stiffens up and gets sore.

So I say all that to say +1 on previous advice keep riding.