Why would you need the HR strap you ask? Well, that’s because certain capabilities require the higher level of detail currently only available via HR straps, specifically around heart rate variability (HRV), or HRM-RUN/TRI metrics. Those features would be:
◾Specific Running Dynamics Metrics: Stride Length, Ground Contact Time Balance and Vertical Ratio
◾Lactate Threshold, Performance Condition, and Stress Score (Note: VO2Max is fine with the optical sensor)
