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The effect of pelvic tilt and cam on hip range of motion in young elite skiers and nonathletes
Open Access Journal of Sports Medicine Pub Date : 2018-08-06 , DOI: 10.2147/oajsm.s162675 Anna Swärd Aminoff , Cecilia Agnvall , Carl Todd , Páll Jónasson , Mikael Sansone , Olof Thoreson , Leif Swärd , Jon Karlsson , Adad Baranto
Open Access Journal of Sports Medicine Pub Date : 2018-08-06 , DOI: 10.2147/oajsm.s162675 Anna Swärd Aminoff , Cecilia Agnvall , Carl Todd , Páll Jónasson , Mikael Sansone , Olof Thoreson , Leif Swärd , Jon Karlsson , Adad Baranto
Background: Current knowledge of the effect of changes in posture and the way cam morphology of the hip joint may affect hip range of motion (ROM) is limited.
Purpose: To determine the effect of changes in pelvic tilt (PT) on hip ROM and with/without the presence of cam.
Study design: This was a cross-sectional study.
Materials and methods: The hip ROM of 87 subjects (n=61 young elite skiers, n=26 nonathletes) was examined using a goniometer, in three different seated postures (flexed, neutral, and extended). The hips of the subjects were further subgrouped into cam and no-cam morphology, based on the magnetic resonance imaging findings in the hips.
Results: There was a significant correlation between the hip ROM and the seated posture in both extended and flexed postures compared with the neutral posture. There was a significant decrease in internal hip rotation when the subjects sat with an extended posture with maximum anterior PT (p<0.0001). There was a significant increase in internal hip rotation when the subjects sat with a flexed posture with maximum posterior PT (p<0.001). External rotation was significantly decreased in an extended posture with maximum anterior PT (p<0.0001), but there was no difference in flexed posture with maximum posterior PT. The hips with cam morphology had reduced internal hip rotation in all three positions, but they responded to the changes in position in a similar manner to hips without cam morphology.
Conclusion: Dynamic changes in PT significantly influence hip ROM in young people, independent of cam or no-cam morphology.
Keywords: hip, cross-sectional studies, rotation, hip joint, range of motion (articular), pelvis, posture, magnetic resonance imaging
中文翻译：
骨盆倾斜和凸轮对年轻的精英滑雪者和非运动员的髋关节运动范围的影响
背景：关于姿势变化的影响以及髋关节的凸轮形态可能影响髋关节运动范围（ROM）的最新知识有限。
目的：确定骨盆倾斜度（PT）改变对髋关节ROM的影响以及有无凸轮的影响。
研究设计：这是一项横断面研究。
材料和方法：使用测角计以三种不同的坐姿（弯曲，中立和伸展）对87位受试者（n = 61位年轻的精英滑雪者，n = 26位非运动员）的髋部ROM进行了检查。根据髋部的磁共振成像结果，将受试者的髋部进一步分为凸轮和非凸轮形态。
结果：与中立姿势相比，伸展和屈曲姿势的髋部ROM和坐姿之间存在显着相关性。当受试者以最大前PT的伸展姿势坐着时，内部髋关节旋转明显减少（p <0.0001）。当受试者以最大后部PT的弯曲姿势坐着时，内部髋关节旋转明显增加（p <0.001）。在最大前PT（p<0.0001），但最大PT后屈姿势没有差异。具有凸轮形态的臀部在所有三个位置的髋关节内部旋转都减少了，但是它们对位置变化的响应方式与没有凸轮形态的臀部相似。
结论： PT的动态变化会显着影响年轻人的髋部ROM，而与凸轮或无凸轮形态无关。
关键词：髋关节，横断面研究，旋转，髋关节，运动范围（关节），骨盆，姿势，磁共振成像
更新日期：2018-08-06
Purpose: To determine the effect of changes in pelvic tilt (PT) on hip ROM and with/without the presence of cam.
Study design: This was a cross-sectional study.
Materials and methods: The hip ROM of 87 subjects (n=61 young elite skiers, n=26 nonathletes) was examined using a goniometer, in three different seated postures (flexed, neutral, and extended). The hips of the subjects were further subgrouped into cam and no-cam morphology, based on the magnetic resonance imaging findings in the hips.
Results: There was a significant correlation between the hip ROM and the seated posture in both extended and flexed postures compared with the neutral posture. There was a significant decrease in internal hip rotation when the subjects sat with an extended posture with maximum anterior PT (p<0.0001). There was a significant increase in internal hip rotation when the subjects sat with a flexed posture with maximum posterior PT (p<0.001). External rotation was significantly decreased in an extended posture with maximum anterior PT (p<0.0001), but there was no difference in flexed posture with maximum posterior PT. The hips with cam morphology had reduced internal hip rotation in all three positions, but they responded to the changes in position in a similar manner to hips without cam morphology.
Conclusion: Dynamic changes in PT significantly influence hip ROM in young people, independent of cam or no-cam morphology.
Keywords: hip, cross-sectional studies, rotation, hip joint, range of motion (articular), pelvis, posture, magnetic resonance imaging
中文翻译：
骨盆倾斜和凸轮对年轻的精英滑雪者和非运动员的髋关节运动范围的影响
背景：关于姿势变化的影响以及髋关节的凸轮形态可能影响髋关节运动范围（ROM）的最新知识有限。
目的：确定骨盆倾斜度（PT）改变对髋关节ROM的影响以及有无凸轮的影响。
研究设计：这是一项横断面研究。
材料和方法：使用测角计以三种不同的坐姿（弯曲，中立和伸展）对87位受试者（n = 61位年轻的精英滑雪者，n = 26位非运动员）的髋部ROM进行了检查。根据髋部的磁共振成像结果，将受试者的髋部进一步分为凸轮和非凸轮形态。
结果：与中立姿势相比，伸展和屈曲姿势的髋部ROM和坐姿之间存在显着相关性。当受试者以最大前PT的伸展姿势坐着时，内部髋关节旋转明显减少（p <0.0001）。当受试者以最大后部PT的弯曲姿势坐着时，内部髋关节旋转明显增加（p <0.001）。在最大前PT（p<0.0001），但最大PT后屈姿势没有差异。具有凸轮形态的臀部在所有三个位置的髋关节内部旋转都减少了，但是它们对位置变化的响应方式与没有凸轮形态的臀部相似。
结论： PT的动态变化会显着影响年轻人的髋部ROM，而与凸轮或无凸轮形态无关。
关键词：髋关节，横断面研究，旋转，髋关节，运动范围（关节），骨盆，姿势，磁共振成像
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