Hera Leto Earbuds: A Breakthrough in Heart Rate Monitoring

In the world of wearable health technology, precision matters. At Actywell Digital Limited, we are dedicated to pushing the boundaries of bio-signal acquisition, and our Hera Leto earbuds are proving to be a game-changer.

A recent scientific study published in Scientific Reports has confirmed what we have long believed—our earbuds deliver exceptional accuracy in heart rate (HR) monitoring, even during intense physical activity like stationary cycling.

Why This Matters

Traditional heart rate monitors often require chest straps or wrist-worn devices, but Hera Leto leverages in-ear sensing technology to provide accurate, real-time physiological data without discomfort. Now, thanks to rigorous scientific validation, fitness enthusiasts, athletes, and healthcare professionals can trust our earbuds to deliver precise HR readings across a variety of exercise conditions.

The Science Behind the Validation

The study involved 28 elite athletes and compared HR data collected by Hera Leto against the gold-standard Polar H10 chest strap. The results speak for themselves:

✅ High correlation (r = 0.970, p < 0.001) with the reference device

✅ Minimal systematic bias (-0.67 bpm) and a mean absolute error of only 2 bpm 

✅ Superior performance metrics compared to leading wrist and arm-worn monitors

Whether during steady-state exercise, exhaustive training, or HIIT, Hera Leto outperformed comparable devices, making it a versatile tool for both fitness tracking and broader health applications.

A Step Forward for Wearable Health Technology

“We are thrilled to see our Hera Leto earbuds validated at such a high level,” said Perry Ko, Re-Founder at Actywell Digital Limited. “This study confirms our commitment to providing non-invasive, in-ear physiological monitoring, and we believe this breakthrough will empower both athletes and everyday users alike.”

Looking Ahead

This validation is just the beginning. As we continue to develop cutting-edge solutions for health monitoring, rehabilitation, sleep tracking, and occupational health, our team is dedicated to making accurate, accessible health data available to everyone.

👉 Read the full scientific study here: https://doi.org/10.1038/s41598-025-00559-5

Stay tuned for more updates as we continue to shape the future of wearable health technology!

Editors: Amber Lin