Amazfit Helio Strap Lengths: Improved Accuracy for Runners

Amazfit's new Helio Strap biceps bands offer two sizes (Charcoal Black and Light Gray) to fit upper arms between 270-420mm, positioning the BioTracker sensor higher for cleaner workout data. The $19.99 price tag is competitive with other similar products, such as the Garmin HRM-Dual ($29.99), but lacks some advanced features like heart rate monitoring. In comparison, the Polar M430 offers more accurate running power tracking, but the Helio Strap's improved wear position could still provide better overall accuracy for runners.