[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

作为游泳训练辅助的浮板/背漂,浮力等级应按体重匹配:15kg以下用双层背漂,15-25kg用可拆卸单层,25kg以上应逐步减少浮具而非依赖大浮力,过度依赖高浮力会阻碍身体平衡感建立

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