The R2200HRT is our most popular home model. The Heart Rate Training (HRT) program allows you to input your target heart rate, and the resistance will automatically adjust to keep you in your target zone. HRT is the most effective way to burn fat and lose weight. The award winning R2200HRT comes equipped with our ECB-PLUS™ Resistance system, QUIET-GLIDE™ Drive Technology, COMFORT ARC™ seat with adjustable lumbar control and contact heart rate.