When walking on a treadmill, people typically hit the tread in a "heel-to-toe pattern" and work the hamstring muscles on the back of the thigh, he explains. Whereas on a stair climber, "the pressure ...

At the top of each lane is a touchpad that each climber must contact to stop the clock. All results are based on time. Each race is usually contested within 10 seconds. In seeding rounds, athletes are ...