A balance (eyes-closed single-leg stand) duration recorder: log stand time and compare against norms to assess balance ability for rehab and fitness testing.
闭眼单脚站立时长是平衡能力常用指标：年龄常模期望≈(70−年龄)×0.4秒。实测/常模比≥1.5为优、≥1.0为良、否则偏弱。比值越高平衡越好，偏弱者建议加强本体感觉与核心稳定训练。
平衡（闭眼单脚）时长。体育竞技工具，帮助计算与分析运动数据。