Amazfit Helio Band: Bicep Band Accuracy for Weight Training & HIIT

Bicep Band for Enhanced Accuracy

• 💡 The Amazfit Helio Band, initially reviewed for wrist-based use, shows potential for improved accuracy when worn on the bicep.
• 🎯 Reasons for bicep wear include avoiding double-wristing, comfort during sleep, and crucially, enhanced heart rate sensor accuracy.
• 🧠 Optical heart rate sensors perform best on fleshier areas, making the bicep a superior location compared to the more bony wrist.

Third-Party Band Solutions

• 🛠️ While Amazfit doesn't offer an official bicep band, third-party watch bands can be adapted due to the Helio Band's standard watch band interface.
• 📌 Finding the correct orientation for the pin mechanism is key, and stretchy bands without Velcro are preferred for a secure fit.
• ✅ These adapted watch bands offer a comfortable and secure alternative, even preferable to the original wrist strap for some users.

Performance in Outdoor Cycling

• 🚴 When worn on the bicep, the Helio Band demonstrated near-identical accuracy to chest and arm heart rate monitors during outdoor cycling.
• ⚠️ A minor instance of signal loss occurred when stopping, but it quickly reacquired the heart rate upon resuming activity.
• 📈 Compared to wrist-based sensors like the Apple Watch Ultra 2, the bicep placement showed fewer delays during rest periods.

High-Intensity Interval Training (HIIT) Results

• 🚣 For rowing, the Helio Band on the bicep provided excellent accuracy, outperforming the Apple Watch Ultra 2 which occasionally read high during intervals.
• 🎿 Similarly, for the SkiErg, the bicep placement yielded very good results, with only minor, transient deviations compared to the Apple Watch Ultra 2.
• ⚡ These HIIT activities, involving gripping and arm movement, highlight the advantage of bicep placement for optical sensor accuracy.

Weight Training Accuracy

• 💪 Wearing the Helio Band on the bicep resulted in significantly more accurate readings during weight training compared to wrist placement.
• 🏋️ While minor deviations occurred on seated rows and shoulder flies, it performed exceptionally well on incline bench, deadlifts, bicep curls, and tricep extensions.
• 📊 Automatic rep counting and exercise recognition were less accurate on the bicep, likely due to the algorithms being designed for wrist movement.

Overall Accuracy and Future Outlook

• ✅ The Helio Band offers generally good accuracy on the wrist, but bicep placement offers a notable improvement, especially for HIIT and weight training.
• 🚀 The current reliance on third-party bands suggests a potential for an official bicep band from Amazfit in the future.