Running stairs isn’t fun. Neither are the toughest miles of a marathon. But if you do the first, the second will come a lot easier—prepping your legs and your mind for the tough stretches you’ll see on race day.
Nike Running

Running stairs isn’t fun. Neither are the toughest miles of a marathon. But if you do the first, the second will come a lot easier—prepping your legs and your mind for the tough stretches you’ll see on race day.

Nike Running