Wrist-based HR fails when you need it the most
ECG grade accuracy helps you stay within your true target zone instead of unintentionally drifting into higher intensity efforts.
Inaccurate heart rate readings can make runners push harder than their body can safely sustain, increasing fatigue and physiological stress.
Consistent heart rate data helps maintain disciplined pacing without early burnout or late race collapse.
Chest-based ECG signals remain reliable during intense running conditions where wrist sensors may struggle.
Accurate heartbeat detection enables meaningful HRV insights to guide recovery and training load.
Precise Zone 2 tracking ensures endurance sessions actually stay aerobic rather than drifting into higher stress zones.
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