Unverified80% confidenceDecision RuleTime unknown
手腕周长小于14cm（女性偏细手腕或青少年）应选主体宽度≤18mm的窄款手环，宽屏大表体会导致腕骨突出处硌手，且运动摆臂时晃动明显影响心率读数准确度
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