242K views · 682 reactions | Ever heard of heart rate-based training? With #Forerunner 165, you can build endurance and tackle goals by going off your watch’s wrist-based heart rate. Here’s how:  Forget the pace and instead focus on the HR zone  Focus on different zones for different benefits The best part? You can set your watch to alert you when you’re pushing it too hard or not hard enough based on heart rate. | Garmin | Facebook