Cross-Training for Fitness
Fitness refers to your heart, and the harder you exercise, the more fit you become. But every time you exercise vigorously your muscles are injured, and the harder you exercise, the longer it takes for your muscles to heal. Muscle biopsies done the day after a person exercises vigorously show bleeding into the muscles and disruption of the Z-bands that hold muscle filaments together. You are not supposed to exercise vigorously again until the muscle soreness disappears.
Most competitive athletes set up training programs so they exercise vigorously enough on one day to make their muscles feel sore for the next day or two and then after the soreness disappears, they exercise vigorously again. You can use the same
...they ve turned 50 and can t really compete with the young guys anymore. With the money at stake, they too are all working out. This group of players both amateur and pro is the biggest demographic that needs it ...













