Other than my "structural" problems, I am a very healthy, active, and competitive 65 year old. I have cycled since I was 20 years old. I regularly cycle between 150 and 200 miles per week from April -October. In the winter, I spin 4 times a week. I participate in three to four triathlon relays a year. I cycle, two of my children round out the team. I also do a 110 mile ride with 8500 feet of elevation gain every year. Thank you Dr. Mayman and HSS.