"Had my left hip replaced July 2013 (chronic osteoarthritis), and my right knee (an old injury) replaced in December 2013. In April 2014, less than 4 months after having the knee done, I was able to manage a rigorous 1-hour hike down a steep mountain trail to one of my favorite spots in the world, a natural desert hot spring and river called Deep Creek, located in a high desert plateau north of Lake Arrowhead in Southern California. "