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Showing 2 results for External Rotator Muscles

Masomeh Taghikhani, , ,
Volume 11, Issue 6 (10-2013)
Abstract

The purpose of this study was to compare of hip abductor and external rotator
muscles strength between male soccer players with ACl rupture and healthy
male soccer players. 30 male participants (15 soccer players with ACL rupture
as sample group and 15 healthy soccer players as control group) participated in
this study. Hip abductor and external rotator muscles strength tests including
normalized isometric strength of hip abductor and hip external rotator muscles
were evaluated by dynamometer in both groups. Independent t-test was used to
compare datas between two groups.The results showed significant differences
in normalized isometric strength of hip abductor muscles (P=0.003) and hip
external rotator muscles (P=0.127). Regarding the findings of this study, there is
significant difference of hip muscles strength between male soccer players with
ACL rupture and healthy male soccer players .


N Jamali, Kh Khayambashi, Sh Lenjannejadian, H Esmaeili,
Volume 18, Issue 19 (7-2020)
Abstract

Although hip muscle strengthening has been reported as an effective way to decrease PFPS symptoms, however its effect on lower extremity kinematics is less clear. The current study was done with the aim of investigating the effect of hip abductor and external rotator muscles strengthening exercises on lower extremity kinematics in static and dynamic states. In a randomized controlled trial, 33 patients with patellofemoral pain (PFP) were randomly assigned into exercise (8 female, 30±6.8 y/o, 23.8±2.6 BMI and 8 male, 31.2±7 y/o, 25.6±1.5 BMI) and control (9 female, 29.9±7.3 y/o, 23.2±3.2 BMI and 8 male, 32±6 y/o, 25.5±1.9 BMI) groups. In exercise group they received hip abductor and external rotator strengthening exercises by thera-band 3 times per week for 12 weeks under supervision by a physiotherapist. The control group did not receive any training intervention. Hip muscles strength and kinematics in static and dynamic states, were assessed at baseline and post-intervention. Repeated measures ANOVA by using SPSS were applied to assess the effects of the exercise on measured variables (α=0/05). After 12 weeks of strengthening program, by an increase in abductor muscle strength in women from 19.6 to 26.4 %BW (P=0.000) and in men from 29.9 to 38.1 %BW (P=0.003), and in hip external rotator muscles in women from 13.2 to 16.9 %BW (P=0.024) and in men from 26.3 to 34.9 %BW (P=0.000), dynamic knee valgus angle during single-legged squat improved in women from 170 to 174.6 degrees (P=0.018) and in men from 171.8 to 176.8 degrees (P=0.017) and contralateral pelvic drop angle during stair descending improved only in women from 7.9 to 6 degrees (P=0.04) in the exercise group. No significant difference was observed at quadriceps angle (P≥0.05). The findings suggest that hip muscles strengthening can alter the lower extremity kinematics, in dynamic state, at the frontal plane, and it might be said that due to these changes following hip abductor and external rotator muscles strengthening exercises by thera-band, the symptoms of PFP improve more consistent.


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