Not sure why you decided to create a throwaway, but it's a valid question. https://en.wikipedia.org/wiki/Robert_Marchand_(cyclist) https://en.wikipedia.org/wik

Not sure why you decided to create a throwaway, but it's a valid question. https://en.wikipedia.org/wiki/Robert_Marchand_(cyclist) https://en.wikipedia.org/wiki/Robert_Marchand_(cyclist) Aged 35 he finished seventh in the Grand Prix des Nations in 1946.[3] He returned to cycling in 1978[2] and continued training after his 100th birthday. My point is that the guy has very clearly been training and seriously cycling for a long time. While you can do it on normal city streets, you are often served better to do that on dedicated bike paths or on the open road. You can reduce the impact of cars all you want and even make your city bike friendly but that's not going to change your ability to really train. It's not crazy to think that his health benefits are from this elevated level of training and not just leisurely cycling.