Ryman Augustsson Sofia, Sjöstedt Erik
Department of Sport Science, Faculty of Social Sciences, Linnaeus University, Kalmar, SE-391 82, Sweden.
Samrehab, Västervik, Sweden.
BMC Sports Sci Med Rehabil. 2023 Apr 13;15(1):55. doi: 10.1186/s13102-023-00669-5.
Studies investigating ankle condition in subjects with chronic ankle instability (CAI) using an on-the-field test battery are scarce. Understanding which tests that are most challenging for these subjects has the potential to set realistic goals in rehabilitation and return-to-sports criteria. Thus, the primary aim of this study was to investigate CAI subjects regarding strength, balance and functional performance with an easily used test battery that required minimal equipment.
This study was conducted with a cross-sectional design. A total of 20 CAI subjects, engaged in sports, and 15 healthy subjects serving as a control group, were tested for assessment of strength, balance and functional performance. A test battery was developed accordingly; isometric strength in inversion and eversion, the single leg stance test (SLS), single leg hop for distance (SLHD) and side hop test. The limb symmetry index was calculated to determine whether a side-to-side lower limb difference could be classified as normal or abnormal. The sensitivity of the test battery was also calculated.
The subjects were 20% weaker on the injured side compared with the non-injured side in eversion (p < 0.01) and 16% weaker in inversion (p < 0.01) (Table 2). For the SLS test, the mean score of the injured side was 8 points (67%) higher (more foot lifts) compared to the non-injured side (p < 0.01). The mean distance of the SLHD was 10 cm (9%) shorter for the injured side compare to the non-injured side (p = 0.03). The mean number of side hop was 11 repetitions (29%) fewer for the injured side compare to the non-injured side (p < 0.01). Six of the 20 subjects obtained abnormal LSI values in all five tests whereas none obtained normal values in all tests. The sensitivity of the test battery was 100%.
Deficits in muscle strength, balance and functional performance appear to be present in CAI subjects with the largest impairments in balance and side hop performance, which stresses the need for return to sport criteria for this group of subjects.
Registered retrospectively on 24/01/2023. NCT05732168.
使用现场测试组合来研究慢性踝关节不稳（CAI）受试者踝关节状况的研究很少。了解哪些测试对这些受试者最具挑战性，有可能为康复和恢复运动标准设定现实的目标。因此，本研究的主要目的是使用一种所需设备最少、易于使用的测试组合，对CAI受试者的力量、平衡和功能表现进行研究。
本研究采用横断面设计。共有20名从事体育运动的CAI受试者和15名健康受试者作为对照组，接受了力量、平衡和功能表现的评估。相应地开发了一种测试组合；内翻和外翻等长力量测试、单腿站立测试（SLS）、单腿跳远距离测试（SLHD）和侧向跳测试。计算肢体对称指数，以确定下肢两侧差异是否可归类为正常或异常。还计算了测试组合的敏感性。
与未受伤侧相比，受伤侧的外翻力量弱20%（p < 0.01），内翻力量弱16%（p < 0.01）（表2）。对于SLS测试，受伤侧的平均得分比未受伤侧高8分（67%）（更多次提脚）（p < 0.01）。受伤侧的SLHD平均距离比未受伤侧短10厘米（9%）（p = 0.03）。受伤侧的平均侧向跳次数比未受伤侧少11次（29%）（p < 0.01）。20名受试者中有6名在所有五项测试中获得了异常的LSI值，而没有人在所有测试中获得正常值。测试组合的敏感性为100%。
CAI受试者似乎存在肌肉力量、平衡和功能表现方面的缺陷，其中平衡和侧向跳表现受损最大，这强调了为这组受试者制定恢复运动标准的必要性。
于2023年1月24日进行回顾性注册。NCT05732168。
