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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
Çınar-Medeni O. 1, Colakoglu F. F. 2, Yüce K. 3, İpekoğlu G. 2, Baltaci G. 3
1 School of Health, Department of Physiotherapy and Rehabilitation, Çankırı Karatekin University;
2 School of Physical Education and Sport, Gazi University;
3 Private Ankara Güven Hospital
AIM: The aim of this study was to analyze the effect of knee muscle strength on performance tests in orienteers.
METHODS: Thirty-seven orienteers were voluntarily included in this study. Isokinetic knee flexor and extensor muscles’ strength was assessed at 120°/sec velocity for both “dominant leg” (DL) and “nondominant leg” (NdL). “Single-legged hop test” (SLHT), “Flamingo balance test” (FBT), “Star Excursion Balance Test” (SEBT), vertical jump and reach test (for anaerobic power), T-drill test and 20 m shuttle run test (for aerobic power) were performed. Correlation and regression analyses were done to analyze data.
RESULTS: MaxVO2 levels showed moderate correlations with DL’s “flexor peak torque” (FPT) and NdL’s “extensor peak torque” (EPT) and FPT values respectively (r=0.49, r=0.38, r=0.58). FPT of NdL was a predictor of maxVO2 level (R2=0.33). Anaerobic power has a relationship with EPT of NdL (r=0.43) and T-drill test with EPT and FPT values of both DL and NdL respectively (r=-0.35, r=-0.63, r=-0.53, r=-0.58). EPT of NdL was a predictor for anaerobic power (R2=0.19) and FPT of DL for agility (R2=0.40). Nonparametric linear regression results showed that EPT is a predictor in DL (median slope=-0.71, p=0.01), and FPT in NdL (median slope=-0.90, p=0.006) for FBT. FPT was a predictor of SEBT scores for both legs (R2 between 0.13-0.27) except for posterolateral direction in NdL. For SLHT, EPT was determiner in DL (R2=0.21), FPT was determiner in NdL (R2=0.30).
CONCLUSION: Evaluation and improvement of knee flexor and extensor muscle strength are of importance to improve orienteering performance.