It's amazing what electric bikes do to get people out there. My 70+ yr old dad -who has a bad back & knees, replaced hip, arthritis in fingers & knees, and a grumpy disposition- has done close to 20k in four years. He can't walk more than a km or two. My mom, with health issues of her own, did 25k in the same time. And yes, they sometimes go too fast, are a menace for other old people in cars (who are a menace themselves) and use electric assist for 75% of power. They're out there though!