[KongchangAI]
Unverified80% confidenceFactTime unknown

运动心率耳机的PPG光学传感器在耳道内测量误差普遍比手腕更小(耳部血流稳定),高强度间歇训练时与胸带对比误差应控制在±5bpm内才算合格;耳挂式比入耳式传感器贴合更稳定

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