The most important muscle an athlete develops is her heart. Generally as she becomes more fit, her resting heart rate slows - a sign that her heart is pumping blood with greater efficiency. In the first six to 12 weeks of training, resting heart rate decreases by five to 10 percent. The...
* Track average, resting and maximum heart rate. * Track the difficulty of each workout and how you felt. * Track weather conditions, routes, injuries and equipment. * Track up to 200 splits per workout. * Create and save predefined workouts (programs); enter future workouts in one mouse...