HowToBeFit Wellness Technology - Includes fitness test, training programs, and Polar pulse and heart rate monitors. Sark Products - Shop for a variety of heart rate monitors and related accessories for athletics, personal fitness, and cardiac rehabilitation. Fitmed, Inc - Online retailer specializing in the sale of heart rate training material and monitors. Sensor Dynamics - Manufactures and sells heart rate monitors, pedometers, and RF and contact pulse receiver boards for exercise equipment. Health Check Systems, Inc - Shop for monitors by Reebok and Polar, Suunto sports watches, Timex bodylink systems, and Mio strapless heart rate monitors. Polar USA - Manufacturer and retailer of personal and institutional monitors for fitness users; includes products, specifications, and resources for heart rate training and fitness.