It is a great fun, family and workhorse. Peddling is really great exercise for your knee9, as it builds up your calves and quads (thighs) and glutes ( bum muscles) , thus providing great support for ankles , knees and hips, and there are no jolting actions. . Try initially peddling 5 to 10 minutes in low gear. It is also very beneficial, for your breathing (cardio) and your brain. ride only on your sidewalks and bike paths initialy, and, with time, the world is virtually at your feet. Also great for picnics, shopping, or accompanying kids to school.