Department of Health and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Department of Sport Science at the Faculty of Social Sciences, Linnaeus University, Kalmar, Sweden.
Gait Posture. 2023 Jun;103:1-5. doi: 10.1016/j.gaitpost.2023.04.013. Epub 2023 Apr 14.
Maximum-strength tests are commonly used to detect muscle weakness in persons with cerebral palsy (CP). Tests of explosive strength (power) in the lower extremities, such as vertical jump tests, are more uncommon but might supplement maximum-strength testing by providing additional information about motor function.
Is it feasible and useful to measure single-leg vertical jumping in young adults with CP?
Eleven persons with spastic CP (18-30 years), able to walk without support, were compared with a reference group. Jump height and power generation in jumping were measured using a 3D motion-analysis system and force plates. Maximum strength in plantarflexors was measured on the same occasion. Data were analysed using non-parametric statistics.
Jump height was significantly greater in the reference group than in the group with CP, both relative to the less-involved leg of the participants with CP (p = .007) and relative to their more-involved leg (p < .001). In the group with CP, jump height was twice as great for the less-involved leg than for the more-involved leg (p = .008). Power generation at the hip joint was similar between the groups but differed for the knee and ankle joints (p = .001-.033). In the reference group, most of the power was generated at the ankle joint, while the hip was the dominant power generator for the more-involved leg in the group with CP. Muscle strength in the group with CP showed a high correlation with jump height (rho = .745, p < .001) and power generation at the ankle (rho = .780, p = .001).
The single-leg vertical jump test proved capable of measuring jump height and power generation in participants with CP. It also identified explosive muscle weakness both relative to a reference group and between legs. Hence the jump test may provide information additional to common tests of maximal muscle strength in persons with CP.
最大力量测试常用于检测脑瘫（CP）患者的肌肉无力。下肢爆发力（功率）测试，如垂直跳跃测试，较为少见，但可能通过提供有关运动功能的额外信息来补充最大力量测试。
测量 CP 青少年的单腿垂直跳跃是否可行且有用？
将 11 名痉挛型 CP 患者（18-30 岁，可独立行走）与参考组进行比较。使用三维运动分析系统和测力板测量跳跃高度和跳跃中的功率产生。在同一时间测量足底屈肌的最大力量。使用非参数统计进行数据分析。
参考组的跳跃高度明显高于 CP 组，无论是相对于 CP 患者的非受累腿（p=0.007）还是相对于受累腿（p<0.001）。在 CP 组中，非受累腿的跳跃高度是受累腿的两倍（p=0.008）。髋关节的功率产生在两组之间相似，但膝关节和踝关节不同（p=0.001-0.033）。在参考组中，大部分功率产生于踝关节，而 CP 组中受累腿的主要功率发生器是髋关节。CP 组的肌肉力量与跳跃高度（rho=0.745，p<0.001）和踝关节的功率产生（rho=0.780，p=0.001）高度相关。
单腿垂直跳跃测试能够测量 CP 患者的跳跃高度和功率产生。它还分别相对于参考组和双腿识别出爆发性肌肉无力。因此，跳跃测试可能为 CP 患者的最大肌肉力量常规测试提供额外的信息。
