Relationship between Hip and Knee Strength and Knee Valgus Angle during Drop Jump in Elite Female Athletes

Saki, Farzaneh; Rajabi, Reza; Alizadeh, Mohammad hosein; Tabatabaei, Farhad

Volume 4, Issue 1 (Spring 2014) PTJ 2014, 4(1): 39-46 | Back to browse issues page

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Saki F, Rajabi R, Alizadeh M H, Tabatabaei F. Relationship between Hip and Knee Strength and Knee Valgus Angle during Drop Jump in Elite Female Athletes. PTJ 2014; 4 (1) :39-46
URL: http://ptj.uswr.ac.ir/article-1-137-en.html

Relationship between Hip and Knee Strength and Knee Valgus Angle during Drop Jump in Elite Female Athletes

Farzaneh Saki ^*

¹, Reza Rajabi¹

, Mohammad hosein Alizadeh¹

, Farhad Tabatabaei

1- Tehran University

Abstract: (6001 Views)

Purpose: The purpose of this study was to investigate the relationship between hip and knee strength with knee valgus angle during drop jump in elite female athletes.

Methods: Forty female athletes (mean ± SD age, 21.5 ± 1.99 years height, 169.08 ± 8.25 cm body mass, 61.05 ± 10.06 kg) participated in this study. Isometric hip and knee muscles strength were evaluated using standard clinical procedures and a handheld dynamometer. Knee valgus angle was assessed using a 6-camera motion analysis system during a drop jump task. Pearson correlation analyses were performed to determine the relationship between hip and knee muscles strength and knee valgus angle at initial contact (P≤0.05).

Results: Hip abductor strength and knee flexor-extensor ratio were found to be negatively correlated with knee valgus angle (r = –0.229, P = 0.04 and r = –0.446, P = 0.002, respectively).

Conclusion: No relationship between measure of hip external rotation strength and knee valgus angle was observed (P = 0.39). Strength training of the hip and knee musculature may still need to be addressed in prevention programs, but it also should be combined with teaching proper

Keywords: Strength, Knee Valgus Angle, Knee Injuries, Kinematics

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Type of Study: Research | Subject: Special
Received: 2013/08/12 | Accepted: 2013/12/5 | Published: 2014/04/1

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