Ozunlu Nihan, Basari Gul Oznur, Baltaci Gul
Hacettepe University, Faculty of Health Sciences, Department of Physical Therapy and Rehabilitation, 06100 Ankara, Turkey. nihan
Foot (Edinb). 2010 Jun-Sep;20(2-3):55-60. doi: 10.1016/j.foot.2010.03.006. Epub 2010 Jul 8.
The purpose of this study was to investigate the effects of weight on ankle stability in adolescent basketball players.
20 non-injured subjects (age=11.05+/-1.5 years) were included in this study. Each subject performed a 15min warm-up by running or riding a stationary bike. The Star Excursion Balance Test (SEBT), single-leg balance test (performed with eyes open and eyes closed) and vertical jump test were performed with dominant lower extremity. 1 week later, same tests were performed with a schoolbag. The schoolbag contained weight bars as 20% of the players own body weight.
Only posteromedial component of SEBT had significant difference between non-weight measurement and weighted measurement (p=0.004). Single-leg stance test performed with eyes open (p=0.006) and closed (p=0.001) had significant difference between non-weight measurement and weighted measurement. Also the vertical jump test had significant difference between non-weight measurement and weighted measurement (p=0.001).
These findings indicate that 20% weight of their own body weight does not affect dynamic ankle stability and postural limitations, which are magnified by advancing weight. We are confident in our conclusions because of the three-way interaction noted with posterior/medial with weight in SEBT. Furthermore, Star Excursion Balance test is more effective both weight and non-weight in measuring functional stability of the ankle.
本研究旨在调查体重对青少年篮球运动员踝关节稳定性的影响。
本研究纳入了20名未受伤的受试者（年龄=11.05±1.5岁）。每位受试者通过跑步或骑固定自行车进行15分钟的热身。使用优势下肢进行星标偏移平衡测试（SEBT）、单腿平衡测试（睁眼和闭眼状态下进行）以及垂直跳跃测试。1周后，背着一个装有杠铃片且重量为运动员自身体重20%的书包重复进行相同测试。
仅SEBT的后内侧分量在非负重测量和负重测量之间存在显著差异（p=0.004）。睁眼（p=0.006）和闭眼（p=0.001）状态下进行的单腿站立测试在非负重测量和负重测量之间存在显著差异。此外，垂直跳跃测试在非负重测量和负重测量之间也存在显著差异（p=0.001）。
这些发现表明，自身体重20%的重量不会影响动态踝关节稳定性和姿势限制，而随着重量增加这些会被放大。由于在SEBT中观察到后内侧与重量之间的三向相互作用，我们对我们的结论充满信心。此外，星标偏移平衡测试在测量踝关节功能稳定性方面无论是负重还是非负重状态下都更有效。
