Why does HRM-Dual consistently shows *very* high HR (170+) during first 6-8 min of warmup during runs? Is this a fit issue? Don't feel like I've maxed out my HR; not gasping
Garmin Premium HRM-Dual Heart Rate Monitor Ant+ & BT Sensor Only No Strap 753759223137 | eBay
Tutorial - HRM-Dual: Using Your Heart Rate Monitor - YouTube
REVIEW: Garmin HRM-PRO | Heart rate belt for running | Read the review - Inspiration