Mohammad Walaa S, Elsais Walaa M
Department of Physical Therapy, College of Applied Medical Sciences, Majmaah University, Majmaah, Saudi Arabia.
Department of Biomechanics, Faculty of Physical Therapy, Cairo University, Giza, Egypt.
Orthop J Sports Med. 2020 Nov 5;8(11):2325967120962802. doi: 10.1177/2325967120962802. eCollection 2020 Nov.
Although running can provide health benefits, knee joint injuries are frequently reported by recreational runners. To date, the precise mechanism responsible for anterior knee pain remains elusive, and the source of symptoms is debated. Inconsistencies are found in the literature pertaining to the relationship between hip mechanics and activity in the quadriceps and gluteus maximus (GMax) during the running gait.
PURPOSE/HYPOTHESIS: To investigate the correlations between hip rotation and the activity in the quadriceps and GMax during running. We hypothesized that increased hip rotation is correlated with decreased activity in these muscles.
Descriptive laboratory study.
A cohort of 30 healthy recreational runners volunteered to participate in the study (mean ± SD age, 28.8 ± 5.66 years; height, 1.73 ± 0.05 m; mass, 69 ± 6.3 kg; body mass index, 23.02 ± 1.42 kg/m). Surface electromyography (EMG) data were obtained from the GMax, vastus medialis obliquus (VMO), and vastus lateralis obliquus (VLO). These data were synchronized with a motion capture system during a level-surface running activity at a speed of 3.2 m/s.
A significantly strong, negative correlation was found between the hip internal rotation angle and EMG activity of the GMax and the VMO. However, the VLO showed a significant, moderate, and positive correlation of activity with the hip internal rotation angle.
The present study showed that during level-surface running, decreased GMax activity may be the cause of distal joint injuries and alteration in quadriceps muscle activity.
Because GMax activity is important for controlling the lower body mechanics during running, evaluating GMax activity and internal hip rotation angle is important to prevent the running-related knee injuries that are linked to quadriceps deficits, such as patellofemoral pain. Additionally, clinicians and trainers should consider strengthening the GMax while rehabilitating running-related knee injuries.
尽管跑步有益健康，但业余跑步者经常报告膝关节受伤。迄今为止，导致膝前疼痛的确切机制仍不清楚，症状来源也存在争议。关于跑步步态中髋部力学与股四头肌和臀大肌（GMax）活动之间的关系，文献中存在不一致之处。
目的/假设：研究跑步过程中髋部旋转与股四头肌和GMax活动之间的相关性。我们假设髋部旋转增加与这些肌肉的活动减少相关。
描述性实验室研究。
30名健康的业余跑步者自愿参加该研究（平均±标准差年龄，28.8±5.66岁；身高，1.73±0.05米；体重，69±6.3千克；体重指数，23.02±1.42千克/平方米）。通过表面肌电图（EMG）从GMax、股内侧斜肌（VMO）和股外侧斜肌（VLO）获取数据。在以3.2米/秒的速度进行的水平地面跑步活动中，这些数据与运动捕捉系统同步。
发现髋部内旋角度与GMax和VMO的EMG活动之间存在显著的强负相关。然而，VLO的活动与髋部内旋角度呈显著的中度正相关。
本研究表明，在水平地面跑步过程中，GMax活动减少可能是远端关节损伤和股四头肌肌肉活动改变的原因。
由于GMax活动对于控制跑步过程中的下半身力学很重要，评估GMax活动和髋部内旋角度对于预防与跑步相关的膝关节损伤（如髌股疼痛）很重要，而髌股疼痛与股四头肌功能缺陷有关。此外，临床医生和训练师在康复与跑步相关的膝关节损伤时应考虑加强GMax。
