its use is commonly beneficial

When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking. I have myself ridden the bicycle most during my practice as a physician and during my work in letters. In the morning or the afternoon, before or after work as the mood o'ertakes me, I mount the wheel and am off for a spin of a few miles up or down the road from my country place. I can only speak words of praise for the bicycle, for I believe that its use is commonly beneficial and not at all detrimental to health, except in the matter of beginners who overdo it.

- Sir. Arthur Conan Doyle 

Scientific American 

1896

Flickr (cc) by Marcus_jb1973