❤️ Training heart rate ❤️ Maximum heart rate ❤️ Heart rate training zones What do all these terms mean and how training with heart rate can take your... | By Polar
Polar - Running at the right intensity is the key to bringing your training and racing to the next level. 🏃♂️🏃♀️💨 ❤️ Heart rate zones 💨 Speed zones ⚡️ Power zones Guess
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