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TOMTOM SPARK 3
Monitoring your heart rate during training provides the instant feedback you need to train more efficiently and see results faster.
Measuring heart rate is important because the same run may take different levels of effort each day. Factors like stress, sleep, recovery time, and hydration all play a part.
Understand your 5 heart rate zones, know which energy source you are using and maximize your performance. Your zones are based on percentages of your maximum heart rate.
TomTom Spark 3 can measure your heart rate 24/7. See how your heart rate changes throughout the day, and check your resting heart rate to see how you recovered from your last activity.