Lian O, Engebretsen L, Ovrebø R V, Bahr R
Norwegian Volleyball Federation, Rud, Norway.
Am J Sports Med. 1996 May-Jun;24(3):380-5. doi: 10.1177/036354659602400322.
The aim of the present study was to characterize the performance ability of the leg extensor apparatus in a group of athletes with jumper's knee and to compare the results with those of a matched control group without knee symptoms. Patient and control groups (12 players in each) were selected from a population of 141 well-trained male Norwegian volleyball players, of which 55 (39%) satisfied the diagnostic criteria for jumper's knee. The testing program consisted of a standing jump, a countermovement jump, a 15-second rebound jump test, a standing jump with a 20-kg load, and a standing jump with a load corresponding to one-half of the subject's body weight. Jump height and power were measured using a contact mat connected to an electronic timer. The test results of the patient group were significantly higher than those of the control group for the countermovement jump (15% increase), power during rebound jump (41%), work done in standing jump (12%) and countermovement jump (22%), and the difference between countermovement jump and standing jump (effect of adding eccentric component). Athletes with jumper's knee demonstrated better performance in jump tests than uninjured athletes, particularly in ballistic jumps involving eccentric force generation.
本研究的目的是对一组患有跳跃膝的运动员的腿部伸肌装置的运动能力进行特征描述，并将结果与一组无膝关节症状的匹配对照组进行比较。患者组和对照组（每组12名运动员）从141名训练有素的挪威男性排球运动员中选取，其中55名（39%）符合跳跃膝的诊断标准。测试项目包括立定跳远、反向助跑跳远、15秒的反弹跳测试、负重20公斤的立定跳远以及负重相当于受试者体重一半的立定跳远。使用连接到电子计时器的接触垫测量跳跃高度和功率。患者组在反向助跑跳远（增加15%）、反弹跳功率（增加41%）、立定跳远做功（增加12%）和反向助跑跳远做功（增加22%）以及反向助跑跳远和立定跳远之间的差异（添加离心成分的效果）方面的测试结果显著高于对照组。患有跳跃膝的运动员在跳跃测试中的表现优于未受伤的运动员，尤其是在涉及产生离心力的弹道式跳跃中。
