Polar

Add Polar's RS 300X to your fitness regimen and you'll reach your goals in no time. Polar's OwnZone feature tracks your heart rate and automatically adjusts your zones, reducing the chances of overtraining and maximizing your workout. You can also track your weekly training sessions and your last 16 weeks of training, view your calories burned and your average heart rate of each lap and of your total workout. Plus, Polar's interval trainer guides you through heart-rate, pace and distance interval workouts for the most efficient training possible.