Asymmetry of muscle strength in elite athletes

Drid, Patrik; Drapšin, Miodrag; Trivić, Tatjana; Lukac, Damir; Obadov, Slavko; Milošević, Zoran

doi:10.2478/v10101-009-0002-1

Cited by 20 publications

(15 citation statements)

References 5 publications

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“…In the present study that ratio was higher in young and in adolescent male football players (1.18 and 1.11, respectively) than in untrained subjects (0.84) which was suggestive of a flexors/extensors misbalance in football players, which was also noticed in another research in female football players (1.19; [11]). Such a misbalance, combined with sport-specific asymmetric work, may bring about postural disorders [3] in addition to other implications in performance induced by misbalances between agonist and antagonist muscles [2].…”

Section: Discussionmentioning

confidence: 99%

Core stability of male and female football players

Nikolaidis

2010

Biomedical Human Kinetics

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SummaryStudy aim: To investigate into core stability measures and to establish the preliminary normal data. Material and methods: Three groups of football players were studied: male players, members of an amateur club (Division IV; n = 20), female players, members of a Division I club (n = 28) and male adolescent club players (n = 17). They were subjected to 4 tests of core stability (muscular endurance of trunk flexors and extensors, and of left and right lateral bridge) at the beginning of the 2009/2010 season. Results: No significant between-group differences were found for trunk flexors endurance. Female players were significantly (p<0.01) superior to both male groups with respect to trunk extensors endurance and inferior with respect to flexors-to-extensors ratio. Conclusions:The results may have practical implications for football training and injury prevention.

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Section: Discussionmentioning

confidence: 99%

Core stability of male and female football players

Nikolaidis

2010

Biomedical Human Kinetics

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“…Research papers have shown that ipsilateral ratios are valid tools to assess the effectiveness of rehabilitation protocols (Brown et al, 2000; Dvir et al, 2004; Impellizzeri et al, 2007; Drid et al, 2009a). Many papers report that bilateral differences are an important predictor of injury occurrence (Dauty et al, 2003; Yeung et al, 2009; Fousekis et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Short-Term Isokinetic Training Versus Isotonic Training: Effects on Asymmetry in Strength of Thigh Muscles

Golik-Perić¹,

Drapšin

Obradović

et al. 2011

Journal of Human Kinetics

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The aim of this study was to investigate the effects of two training protocols on the isokinetic performance of athletes. The study was conducted in 38 athletes, (age 23.3 ± 3.6 years) participating in national level leagues of different sports, whose initial concentric hamstrings-to-quadriceps (conH/Q) torque ratio was lower than 0.5. During seasonal testing, an isokinetic measurement of knee extensors and flexors was performed at 60°/s. The athletes were divided into two groups. Nineteen athletes performed the isokinetic training protocol (IT) while the second group of 19 athletes followed the isotonic training protocol (RT). Both protocols lasted 4 weeks. After completing the training protocols, both groups underwent a final isokinetic testing. The isokinetic data revealed significant increases after training in measures of peak torque in both extensor and flexor muscle groups, in both the IT and RT study groups (p < 0.05). There were significant increases (p< 0.05) in conH/Q ratio in both groups after the implemented protocols, but greater in IT group. Consequently, applied IT protocol induced changes in working muscles, thereby restoring detected asymmetry to an acceptable balance more efficiently compared to RT protocol.

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“…In kayaking, both upper limbs are used symmetrically in the movement of drawing the paddle while is a seated position; in canoeing, however, a canoeist draws the paddle on one side while kneeling on one leg, which -as is suspected -may imply the presence of strength asymmetry in different muscle groups. Drid et al [5] indicated that kayakers' muscle strength is distributed symmetrically, but similar results were not reported with regards to canoeists. The attempts to compare the strength symmetry in both disciplines in the same tests were not conducted.…”

Section: Introductionmentioning

confidence: 90%

The assessment of muscle strength symmetry in kayakers and canoeists

Wietrzyński¹,

Mazur-Różycka²,

Gajewski³

et al. 2013

Biomedical Human Kinetics

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Summary Study aim: To determine and compare the muscle strength profile and muscle strength symmetry of kayakers and canoeists. Material and methods: A total of 36 male participants participated in the study, including 25 kayakers and 9 canoeists. Measurements of maximum muscle torque were taken under static conditions for 10 muscle groups: flexors and extensors of the elbow, shoulder, knee, hip, and trunk. Muscle torque was allometrically scaled by body mass. To determine the muscle strength profiles of athletes in both disciplines, residual analysis was used. Two methods were utilized to assess and compare the muscle strength symmetry between left and right limbs. The first one is known as intraclass correlation coefficient (ICC). The second one is an asymmetry coefficient proposed by authors. Results: The study showed that kayakers obtained lower rates of asymmetry indicators than canoeists in most muscle groups. An overall asymmetry coefficient amounted to 0.77 ± 0.20 and 0.99 ± 0.31 (p < 0.05) for kayakers and canoeists, respectively. Moreover, it was observed that the kayakers and canoeists had similar strength profile. The symmetry assessment of maximum muscle torque corresponds to the characteristics of the studied disciplines. Conclusions: The intraclass correlation coefficient is recommended as a measure of strength symmetry for muscle groups comparisons. The asymmetry coefficient is recommended for comparison of individuals.

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Asymmetry of muscle strength in elite athletes

Cited by 20 publications

References 5 publications

Core stability of male and female football players

Core stability of male and female football players

Short-Term Isokinetic Training Versus Isotonic Training: Effects on Asymmetry in Strength of Thigh Muscles

The assessment of muscle strength symmetry in kayakers and canoeists

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