[KongchangAI]
Unverified82% confidenceDecision RuleTime unknown

HRV(心率变异性)生物反馈仪需支持PPG光电容积描记且采样率≥25Hz才能有效捕捉RMSSD/SDNN指标;采样率低于25Hz的消费级手环无法达到训练级精度

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Long-term
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