PW3 shows severe cadence lock, spiking primarily in the first 20 mins. S1 shows 195bpm max vs Garmin’s 159bpm. S2 has a 23bpm avg gap (152bpm PW3 vs 129bpm Garmin). The sensor clearly confuses step rhythm with heart rate at the start of runs. Hardware replacement failed to fix this systemic error.
Moderator edit: Updated label
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