Polar M400 is a waterproof GPS running watch and daily fitness tracker. It can help you plan optimal training, break your records, and even find your way back from a run.
Training load
Shows you how your training affects your body and helps you compare the load of different sessions. Monitor your load continuously to recognize your personal limits and adjust training intensity and duration accordingly. Available on the Polar Flow web service. More ›
Recovery Status
Shows you the time necessary for recovery before the next training session. Available on the Polar Flow web service. More ›
Fitness test
A five-minute test that measures aerobic fitness from your resting heart rate, heart rate variability and your background information. Complete the test regularly to see the progress you’re making. More ›
Running index
Shows how your running performance is developing. More ›
Training benefit
Delivers motivating feedback immediately after training describing the effect of the session. More ›
Smart calories
Lets you know exactly how many calories you’ve burned based on your weight, height, age, gender, your individual maximum heart rate (HRmax) and how hard you’re training. More ›
Activity Guide
Shows how active you’ve been during the day and gives practical guidance for reaching your daily activity goal. More ›
Activity Benefit
Gives feedback on your daily, weekly and monthly activity, showing how your active choices help you stay healthy. More ›
Running Program
Train for a running event with a personal and adaptive training plan in Polar Flow. Choose from four different targets, 5K, 10K, half marathon and marathon, and get a training plan that fits you and your goals. More ›