In 2008 Dr. Shubin Stein replaced the ACL in my right knee. Within three months I was on a bicycle going crazy. Then, in 2017, while standing in a dog park, I was sideswiped by a large dog and it tore my meniscus in my left knee. Last September, Dr. Shubin Stein went in and repaired my meniscus. One year later I participated in BIKE HSS, riding 62.5 miles, and have been doing lengthy bike rides for a while.