[KongchangAI]
Unverified85% confidenceFactTime unknown

耳夹式PPG测HRV比指夹式抗运动干扰稍强但绝对精度均低于胸带ECG;对HRV数据准确性要求高(如科研或精细训练)应选ECG胸带(如Polar H10),其RR间期精度接近医疗级

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