ACTIN Health and Rehabilitation Inc., 5767 Oak Street, Vancouver, BC V6M 2V7, Canada.
Br J Sports Med. 2011 Dec;45(15):1230-7. doi: 10.1136/bjsm.2010.079244. Epub 2011 Apr 18.
To investigate performance levels and accommodation period to functional knee brace (FKB) use in non-injured braced subjects while completing acceleration, agility, lower extremity power and speed tasks.
A 2 (non-braced and braced conditions) × 5 (testing sessions) repeated-measures design.
27 healthy male athletes were provided a custom fitted FKB. Each subject performed acceleration, agility, leg power and speed tests over 6 days; five non-braced testing sessions over 3 days followed by five braced testing sessions also over 3 days. Each subject performed two testing sessions (3.5 h per session) each day. Performance levels for each test were recorded during each non-braced and braced trial. Repeated measures analysis of variance, with a post hoc Tukey's test for any test found to be significant, were used to determine if accommodation to FKB was possible in healthy braced subjects.
Initial performance levels were lower for braced than non-braced for all tests (acceleration p=0.106; agility p=0.520; leg power p=0.001 and speed p=0.001). However, after using the FKB for approximately 14.0 h, no significant performance differences were noted between the two testing conditions (acceleration non-braced, 0.53±0.04 s; braced, 0.53±0.04 s, p=0.163, agility non-braced, 9.80±0.74 s; braced, 9.80±0.85 s, p=0.151, lower extremity power non-braced, 58±7.4 cm; braced, 57±8.1 cm, p=0.163 and speed non-braced, 1.86±0.11 s; braced, 1.89±0.11 s, p=0.460).
An initial decrement in performance levels was recorded when a FKB is used during an alactic performance task. After 12.0-14.0 h of FKB use, performance measures were similar between the two testing conditions.
研究非受伤佩戴支具受试者在完成加速、敏捷、下肢力量和速度任务时，使用功能性膝关节支具（FKB）的表现水平和适应期。
2（不佩戴支具和佩戴支具条件）×5（测试阶段）重复测量设计。
27 名健康男性运动员配备了定制的 FKB。每位受试者在 6 天内进行加速、敏捷、腿部力量和速度测试；在 3 天内进行 5 次非支具测试，然后在 3 天内进行 5 次支具测试。每位受试者每天进行两次测试（每次 3.5 小时）。在每次非支具和支具试验中记录每个测试的表现水平。使用重复测量方差分析，对于任何发现具有统计学意义的测试，进行事后 Tukey 检验，以确定健康佩戴支具的受试者是否可以适应 FKB。
所有测试中，佩戴支具的初始表现水平均低于不佩戴支具（加速：p=0.106；敏捷：p=0.520；腿部力量：p=0.001；速度：p=0.001）。然而，在使用 FKB 约 14.0 小时后，两种测试条件之间没有显著的性能差异（加速：非支具，0.53±0.04 s；支具，0.53±0.04 s，p=0.163；敏捷：非支具，9.80±0.74 s；支具，9.80±0.85 s，p=0.151；下肢力量：非支具，58±7.4 cm；支具，57±8.1 cm，p=0.163；速度：非支具，1.86±0.11 s；支具，1.89±0.11 s，p=0.460）。
在进行非乳酸性能任务时使用 FKB 会记录到初始表现水平的下降。在使用 FKB 12.0-14.0 小时后，两种测试条件下的表现测量值相似。
