Snowed-in? Stir crazy yet? Perhaps a bit of indoor training will take your mind off it. What? You can't stand riding on the trainer anymore? Why not take the stairs?
Here we see French cyclocross star Pierre Jodet performing an unusual form of training, running up stairs to his 8th-floor apartment, then riding back down to the lobby. Back to the top again. Back down. For an hour at a time. Amazing.

From "Miroir Sprint" No.132, 13 December 1948.

Down to the lobby, Back to the top againBack down. For an hour at a time. Amazing.-_-;;