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2" / 4 cm Track every ascent and descent with Hill Splitter - the automatic uphill and downhill detector that uses your speed, distance and altitude data to provide detailed insights for every hill on your route. RUNNING PERFORMANCE TEST helps you keep track of your progress and personalize your heart rate, speed and power zones. LEG RECOVERY TEST tells you whether your legs are ready for high intensity training in just a couple of minutes without any specialist equipment. CYCLING PERFORMANCE TEST allows you to personalize your power zones and tells you your personal functional threshold power (FTP) [requires a compatible power meter]. ORTHOSTATIC TEST AND RECOVERY PRO measure your recovery from heart rate and heart rate variability (HRV) and give you feedback for pro athlete-level recovery. [requires Polar H10 or H9 heart rate sensor] Go Wherever Your Heart Takes You. Handle any environment with military-grade durability and scratch-resistant sapphire glass. Trust your equipment with ultra-long battery and Precision Prime OHR tracking. Know where you stand with turn-by-turn guidance and powerful built-in GPS. Live for adventure with all-new navigation tools, always-on outdoor features, and Polar's ultimate training solutions. Polar Grit X Pro equips you with everything you need to explore the world and understand your body - realizing just how incredible they both are.







