The effect of hip abductors and external rotators strength training on kinematic of lower limb of patients with patellofemoral pain syndrom

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JAMALI N.; KHAYAMBASHI KH.; Lenjannejadian Sh.; ESMAEILI H.

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Journal: Research in Sport Medicine and Technology Year:2020 | Volume:9 | Issue:19 Page(s): 97-111

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Title

The effect of hip abductors and external rotators strength training on kinematic of lower limb of patients with patellofemoral pain syndrom

Author(s)

JAMALI N. | KHAYAMBASHI KH. | Lenjannejadian Sh. | ESMAEILI H. | Issue Writer Certificate

Keywords

Kinematics EvaluationQ1

Quadriceps AngleQ1

Dynamic Knee ValgusQ1

Patellofemoral PainQ1

Hip AbductorQ1

External Rotator MusclesQ1

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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APA: Copy

JAMALI, N., KHAYAMBASHI, KH., Lenjannejadian, Sh., & ESMAEILI, H.. (2020). The effect of hip abductors and external rotators strength training on kinematic of lower limb of patients with patellofemoral pain syndrom. RESEARCH IN SPORT MEDICINE & TECHNOLOGY, 9(19 ), 97-111. SID. https://sid.ir/paper/231431/en

Vancouver: Copy

JAMALI N., KHAYAMBASHI KH., Lenjannejadian Sh., ESMAEILI H.. The effect of hip abductors and external rotators strength training on kinematic of lower limb of patients with patellofemoral pain syndrom. RESEARCH IN SPORT MEDICINE & TECHNOLOGY[Internet]. 2020;9(19 ):97-111. Available from: https://sid.ir/paper/231431/en

IEEE: Copy

N. JAMALI, KH. KHAYAMBASHI, Sh. Lenjannejadian, and H. ESMAEILI, “The effect of hip abductors and external rotators strength training on kinematic of lower limb of patients with patellofemoral pain syndrom,” RESEARCH IN SPORT MEDICINE & TECHNOLOGY, vol. 9, no. 19 , pp. 97–111, 2020, [Online]. Available: https://sid.ir/paper/231431/en

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