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Association between knee-to-hip flexion ratio during single-leg vertical landings, and strength and range of motion in professional soccer players.

Authors
  • Leporace, Gustavo1
  • Tannure, Marcio2
  • Zeitoune, Gabriel1, 3
  • Metsavaht, Leonardo1
  • Marocolo, Moacir4
  • Souto Maior, Alex5
  • 1 Department of Research in Biomechanics, Institute Brazil of Technologies in Health, Rio de Janeiro, Brazil. , (Brazil)
  • 2 Performance Excellence Center, Flamengo Sport Club, Rio de Janeiro, Brazil. , (Brazil)
  • 3 Biomedical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. , (Brazil)
  • 4 Department of Physiology, Institute of Biological Sciences, Universidade Federal de Juiz de Fora, Minas Gerais, Brazil. , (Brazil)
  • 5 Department of Rehabilitation Sciences, University Augusto Mota, Rio de Janeiro, Brazil. , (Brazil)
Type
Published Article
Journal
Sports biomechanics
Publication Date
Jun 01, 2020
Volume
19
Issue
3
Pages
411–420
Identifiers
DOI: 10.1080/14763141.2018.1494207
PMID: 30001180
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The aim of this study was to test the correlation between knee-to-hip flexion ratio during a single leg landing task and hip and knee strength, and ankle range of motion. Twenty-four male participants from a professional soccer team performed a continuous single leg jump-landing test during 10s, while lower limb kinematics data were collected using a motion analysis system. After biomechanical testing, maximal isometric hip (abduction, extension, external rotation), knee extension and flexion strength were measured. Maximum ankle dorsiflexion range of motion was assessed statically using the weight bearing lunge test. Pearson correlation coefficients were calculated to determine the associations between the predictor variables (knee and hip strength, and ankle ROM) and the main outcome measure (knee-to-hip flexion ratio). Correlation between knee-to-hip flexion ratio and hip abductors strength was significant (r = -0.47; p = 0.019). No other significant correlations were observed among the variables (p > 0.05). These results demonstrated that a lower hip abductors strength in male soccer players was correlated with a high knee-to-hip flexion ratio during landing from a single leg jump, potentially increasing knee overload by decreasing energy absorption at the hip. The results provide a novel proposal for the functioning of hip muscles to control knee overload.

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