I'm only 52, but have some osteoarthritis in my neck, and have experienced bouts of pain running down my arm. The links in posts 6 and 14 show neck exercises that are quite similar to what I was told by my physical therapist. It took several months for my neck to heal each time, but the pain did go away.
What's always puzzling, is that a lot of things heal on their own, so one is never sure that the treatment was beneficial, but it seemed to make sense.
I've been able to continue riding, but haven't attempted to ride a drop bar bike. Even a low posture on my upright bar bikes is uncomfortable. So be it.