Yeah. Until a few years ago I often rode with a guy in his 70s. He had a few falls due to balance/reflex problems and broke some things, although not seriously. Then he was walking down a hill in city park in Prague, lost his balance, fell and broke something else. His doctor told him his next fall could be his last. At the insistence of his wife, he stopped riding outdoor and instead does indoor training classes. I do occasionally see him walking outside on a road that's close to vehicles for recreation. It's a wide, flat road that has no tripping hazards. Good to know he is still active even though he cannot do everything he used to.