Polar RCX3 sports watch with GPS. Cross training sports watch for runners, cyclists and fitness enthusiasts. GPS enabled to track route, speed and distance. Helps train at the right intensity. Training Benefit for instant training feedback. Improves performance with endurance training programmes. Polar Fitness Test measures aerobic fitness. Running Index scores your performance. Smart Calories shows how many calories you have burned. The Polar RCX3 is a sports watch with GPS for runners, cyclists and fitness enthusiasts who want guidance to reach their goals. If you're looking to improve your fitness and want to keep up to date with how well you're doing, the smart Fitness Test will tell you exactly what you need to know in just five minutes. By regularly comparing your test results, you can see what progress you are making and how your fitness is improving. If you're looking to keep on top of your running performance you'll find this feature a big help. Regular use over time allows you to see how efficient your running is. Your Running Index score is calculated automatically after every run, based on your heart rate and from the speed data collected from your GPS or stride sensor. A higher reading indicates that you can run faster with less effort. Motivating feedback that's delivered straight to you immediately after exercise is something we can all benefit from. So if you want to know the effect of different training sessions, this feature will tell you exactly what you need to know. You get a quick overview after each session, and for more detailed feedback, you can either check your training file or you can get further in-depth analysis at polarpersonaltrainer.com.