Outside magazine, June 1996
There's actually more to cross-training than a cool pair of shoes. Most activities will help you stay in shape, but when it comes to honing your athletic ability in your primary pursuit, some sports are more equal than others. Here are some recommended training combinations that will improve your performance in five great sports of summer.
Pool running (with an inflatable vest): You're still running, but without the punishment of pavement. Great if you're recovering from or trying to prevent injury.
Calisthenics: Like climbing itself, these exercises use the resistance of your body weight. They build strength without adding bulk that you'll just end up having to drag up the wall anyway.
Swimming: Works the arms, shoulders, and torso in a sustained motion that will increase your paddling strength and endurance.
Rowing: An intense workout that develops the cardiovascular system as well as muscles in the torso, quads, and glutes.