摘要
目的研究踝关节保护支具在模拟跳伞着陆阶段对踝关节的防护效果。方法于2021年8月,用单纯随机抽样法抽取30名男性空降兵为受试对象,先后在穿戴和未穿戴踝关节保护支具的情况下,分别从1.5 m、2.0 m高度的跳台跳下,以半蹲式跳伞着陆姿势着陆于沙地。试验分为1.5 m试验组和对照组与2.0 m试验组和对照组。应用角度传感器和表面肌电仪分别对踝关节冠状面倾斜范围和踝关节周围肌肉的最大随意收缩百分比(MVE%)进行测量和分析,评价踝关节保护支具对踝关节的防护效果。结果相同高度下,试验组受试对象踝关节冠状面倾斜范围均较对照组明显减小,差异均有统计学意义(P<0.05)。相同防护状态下,1.5 m组踝关节冠状面倾斜范围较2.0 m组明显减小,差异有统计学意义(P<0.05)。2 m试验组踝关节冠状面倾斜范围明显小于1.5 m对照组,差异有统计学意义(P<0.05)。与1.5 m对照组比较,1.5 m试验组右侧胫骨前肌和双侧外侧腓肠肌的MVE%减小,而双侧腓骨长肌的MVE%增大,差异均有统计学意义(P<0.05)。与2.0 m对照组比较,2.0 m试验组双侧胫骨前肌和右侧外侧腓肠肌的MVE%减小,双侧腓骨长肌的MVE%增大,差异均有统计学意义(P<0.05)。1.5 m试验组较2.0 m试验组双侧胫骨前肌、双侧外侧腓肠肌和右侧腓骨长肌的MVE%减小,差异均有统计学意义(P<0.05)。1.5 m对照组较2.0 m对照组双侧胫骨前肌、右侧外侧腓肠肌和右侧腓骨长肌的MVE%减小,差异均有统计学意义(P<0.05)。结论佩戴踝关节保护支具可以有效地限制踝关节冠状面倾斜范围,提高踝关节稳定性,减少着陆对踝关节周围肌肉的负荷;降低跳台高度能减小着陆时踝关节冠状面倾斜范围和踝关节周围肌肉负荷。
Objective To study the protective effect of parachute ankle brace on ankle joint during simulated parachuting landing.Methods In August 2021,30 male paratroopers were selected as the test subjects by simple random sampling method.They jumped from the 1.5 m and 2.0 m height platforms respectively with and without parachute ankle brace,and landed on the sandy ground in a semi-squat parachute landing position.The experiment was divided into 1.5 m experimental group and control group and 2.0 m experimental group and control group.Angle sensor and surface electromyograph were used to measure and analyze the coronal tilt range of the ankle joint and the percentage of maximal voluntary contraction(MVE%)of the muscles around the ankle joint,respectively,to evaluate the protective effect of the parachute ankle brace.Results At the same height,the tilt range of coronal plane of ankle in experimental group was significantly reduced compared with control group,and the difference was statistically significant(P<0.05).Under the same protection state,the tilt range of the coronal plane of the ankle in the 1.5 m group was significantly reduced compared with that in the 2.0 m group,and the difference was statistically significant(P<0.05).The coronal plane inclination range of the ankle in 2 m experimental group was significantly lower than that in 1.5 m control group,and the difference was statistically significant(P<0.05).Compared with 1.5 m control group,MVE%of right tibialis anterior muscle and bilateral lateral gastrocnemius decreased in 1.5 m experimental group,while MVE%of bilateral peroneus longus increased,with statistical significance(P<0.05).Compared with 2.0 m control group,the MVE%of bilateral tibialis anterior muscle and right lateral gastrocnemius decreased in 2.0 m experimental group,while the MVE%of bilateral peroneus longus increased,with statistical significance(P<0.05).The MVE%of bilateral tibialis anterior muscle,bilateral lateral gastrocnemius muscle and right peroneus longus muscle in 1.5 m experimental group decreased compared with 2.0 m experimental group,and the differences were statistically significant(P<0.05).Compared with 2.0 m control group,the MVE%of bilateral tibialis anterior muscle,right lateral gastrocnemius muscle and right peroneus longus muscle in 1.5 m control group decreased,and the differences were statistically significant(P<0.05).Conclusion Wearing parachute ankle brace can effectively limit the coronal plane inclination range of ankle joint,improve the stability of ankle joint and reduce the load on the muscles around ankle joint by landing.Reducing the height of the jumping platform can reduce the coronal plane incline range of the ankle and the muscle load around the ankle during landing.
作者
黄新宇
郁英杰
王亦君
刘涛
陈敬地
吴磊
Huang Xinyu;Yu Yingjie;Wang Yijun;Liu Tao;Chen Jingdi;Wu Lei(School of Public Health,Wuhan University of Science and Technology,Wuhan 430065,China;Department of Orthopedics,PLA Airborne Hospital,Wuhan 430101,China;Hubei Provincial Key Laboratory of"Occupational Hazard Identification and Control",Wuhan 430065,China)
出处
《中华劳动卫生职业病杂志》
CAS
CSCD
北大核心
2023年第7期504-508,共5页
Chinese Journal of Industrial Hygiene and Occupational Diseases
基金
职业危害识别与控制湖北省重点实验室项目(OHIC2020G02)
空降兵踝关节保护支具对踝关节周围肌肉遥测肌电测试的研究(2021H10152)。
作者简介
通信作者:吴磊,E-mail:wulei@wust.edu.cn。
