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。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Test protocol | time stops when the stance foot moves or the raised foot lands | Fitness testing standards |
| Age norms | hold time declines with age, so compare within age bands | Fitness testing standards |
| Fall risk link | poor static balance associates with higher fall risk | Geriatric medicine literature |
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。