Saç Ajlan, Taşmektepligil Mehmet Yalçın
Department of Coaching Education, Kırkpınar School of Physical Education and Sports, Trakya University, Edirne, Turkey.
Department of Sport Management, Faculty of Sport Sciences, Ondokuz Mayıs University, Samsun, Turkey.
Turk J Phys Med Rehabil. 2018 Aug 13;64(4):308-313. doi: 10.5606/tftrd.2018.2366. eCollection 2018 Dec.
The aim of this study was to investigate the correlation between the Q angle and the isokinetic knee strength and muscle activity.
Between March 2016 and April 2016, a total of 50 healthy and right-leg dominant men (mean age 22.3±2.3 years; range, 18 to 27 years) with a Q angle between 5° and 20° and active in sports were included. An isokinetic strength test of the knee joint extensor and flexor muscles at angular velocities of 60, 120, 180, 240, and 300°·s-1 was tested who had a Q angle of 5 to 20° and were active in sports. Surface electromyography (sEMG) was used to determine these muscles' activity levels.
Negative correlations were between the Q angle and the average peak torque (APT) in extension (E) and flexion (F), the average power (APE,F) at all angles, the joint angle at the PT (JAPTE) at 240, 180, 120 and 60°·s-1; JAPTF at 300, 240 and 180°·s-1; and the time to PT (TPTF) at 180°·s-1. There was a positive correlation between the Q angle and TPTE (at 60°·s-1). No significant relationship between the Q angle and the level of EMG activity at any angular velocity of the muscles, as well as the VM:VL EMG activity ratio was found.
A higher Q angle is associated with decreased isokinetic knee strength, power output, and torque angles. It is thought that possible high Q angle-related knee joint disorders and sports injuries can be avoided by including proper quadriceps strength exercises in exercise prescriptions to be prepared.
本研究旨在探讨Q角与等速膝关节力量及肌肉活动之间的相关性。
2016年3月至2016年4月，共纳入50名健康且右腿为主导的男性（平均年龄22.3±2.3岁；范围18至27岁），其Q角在5°至20°之间且积极参与体育运动。对Q角为5°至20°且积极参与体育运动的受试者进行膝关节伸肌和屈肌在角速度为60、120、180、240和300°·s-1时的等速力量测试。采用表面肌电图（sEMG）来确定这些肌肉的活动水平。
Q角与伸展（E）和屈曲（F）时的平均峰值扭矩（APT）、所有角度的平均功率（APE,F）、在240、180、120和60°·s-1时的峰值扭矩关节角度（JAPTE）；在300、240和180°·s-1时的JAPTF；以及在180°·s-1时的峰值扭矩时间（TPTF）呈负相关。Q角与TPTE（在60°·s-1时）呈正相关。未发现Q角与肌肉在任何角速度下的肌电图活动水平以及股内侧肌：股外侧肌肌电图活动比值之间存在显著关系。
较高的Q角与等速膝关节力量、功率输出和扭矩角度降低有关。认为通过在准备的运动处方中纳入适当的股四头肌力量训练，可以避免可能与高Q角相关的膝关节疾病和运动损伤。
