Association between Selected Screening Tests and Knee Alignment in Single-Leg Tasks among Young Football Players

Bartosz Wilczyński, Łukasz Radzimiński, Agnieszka Sobierajska-Rek and Katarzyna Zorena
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Bartosz Wilczyński: Department of Immunobiology and Environment Microbiology, Medical University of Gdansk, 80-219 Gdansk, Poland
Łukasz Radzimiński: Department of Physiology and Biochemistry, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland
Agnieszka Sobierajska-Rek: Department of Rehabilitation Medicine, Faculty of Health Sciences with Institute of Maritime and Tropical Medicine, Medical University of Gdansk, 80-219 Gdansk, Poland
Katarzyna Zorena: Department of Immunobiology and Environment Microbiology, Medical University of Gdansk, 80-219 Gdansk, Poland

IJERPH, 2022, vol. 19, issue 11, 1-15

Abstract: This study aimed to examine the relationship between knee valgus in the frontal plane projection angle (FPPA) during single-leg squat (SLS), single-leg landing (SLL), and other selected clinical tests in young athletes. Forty-three young healthy elite football players (age: 13.2 (1.7) years) that were regularly training in a local sports club participated in the study. The FPPA was assessed using 2D video analysis. The screening tests included the passive single-leg raise (PSLR), hip external and internal rotation (hip ER and IR), sit and reach test, weight-bearing lunge test (WBLT), modified star excursion balance test (mSEBT), countermovement jump (CMJ), single-leg hop for distance (SLHD), and age peak height velocity (APHV). There was a significant positive relationship between the knee valgus angles in the SLS test and the sit and reach test (r = 0.34) and a negative relationship with the hip ER ROM (r = −0.34) ( p < 0.05). The knee valgus angles in the SLL were negatively associated with the hip IR (r = −0.32) and ER ROM (r = −0.34) and positive associated with the WBLT (r = 0.35) and sit and reach test (r = 0.33) ( p < 0.05). Linear regression analysis showed that the results of the hip ER ROM and sit and reach tests were independent predictors of the FPPA in the SLS test (r 2 = 0.11, p = 0.03 and r 2 = 0.12, p = 0.02, respectively). The conducted study showed that individuals with more hip range of motion, more spine flexion extensibility, and less ankle dorsiflexion ROM may be more likely to experience high degrees of knee valgus in FPPA.

Keywords: injury prevention; injury risk reduction; sports performance; dynamic knee valgus; knee kinetic (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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