The older we get, the more important our cardiovascular health. When it comes to aerobic training, how you exercise is just as important as how often you exercise. The heart rate zone model is a popular approach to monitoring your endurance training. Five heart rate zones range from 1 being low intensity to 5 being […]
Get 15% Off Your First Order
Join the Flex Fam to get the inside scoop,
special deals, and helpful bone & joint tips!