Faculty of Health, Department of Trauma and Orthopedic Surgery, University Witten Herdecke, Witten, Germany.
Vice-rectorate for Teaching and Studies, Central Evaluation of Studies and Teaching, University of Cologne, Koeln, Germany.
Int J Sports Med. 2020 Oct;41(11):729-735. doi: 10.1055/a-1171-2548. Epub 2020 Jun 3.
Side differences in the limb symmetry index during hop tests have been rarely investigated in uninjured athletes. Unknown differences can result in false interpretation of hop tests and affect return to sport decision. Hypothesis was that un-injured athletes in Judo and Taekwondo have side differences in hop test and that asymmetries can be predicted based on the athletes fighting display. Differences, risk relationships were analyzed using the chi-squared test and the odds ratio. A two-tailed p value of<0.05 was considered statistically significant. 115 athletes from the national teams were included (mean age 18.4 years; range 13-27 years). 93, 97.4 and 98.3% did not have symmetric hop distance for three hop tests. Up to a quarter did not reach a limb symmetry index of>90. Moreover, 57.4% (n=66) reached longer jumping distance with the standing leg. Ignoring such pre-existent side differences in evaluation of hop tests and not knowing which limb was dominant prior the injury, can lead to premature or delayed return to sports in the rehabilitation process. Therefore, it might be helpful to refer to individual jump lengths for each limb in case of injury by using hop tests in pre-season screening in professional athletes in Judo and Taekwondo.
在未受伤的运动员中，很少有研究调查过跳跃测试中肢体对称性指数的侧别差异。未知的差异可能导致跳跃测试的错误解释，并影响重返运动的决策。假设在柔道和跆拳道中，未受伤的运动员在跳跃测试中存在侧别差异，并且可以根据运动员的格斗表现来预测不对称性。使用卡方检验和优势比分析差异和风险关系。双侧 p 值<0.05 被认为具有统计学意义。共有 115 名国家队运动员被纳入研究（平均年龄 18.4 岁；范围 13-27 岁）。在三次跳跃测试中，有 93%、97.4%和 98.3%的运动员的跳跃距离没有达到对称。多达四分之一的运动员的肢体对称性指数没有达到>90。此外，57.4%（n=66）用支撑腿跳得更远。在评估跳跃测试时忽略这些预先存在的侧别差异，并且不知道受伤前哪条肢体占主导地位，可能会导致康复过程中过早或延迟重返运动。因此，在柔道和跆拳道等职业运动员的季前筛查中，使用跳跃测试时，参考每个肢体的个体跳跃长度可能会有所帮助。
