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The assessment of muscle strength symmetry in kayakers and canoeists

100%

Wietrzyński M., Mazur-Różycka J., Gajewski J., Michalski R., Różycki S., Buśko K.

Biomedical Human Kinetics

2013

vol. 5

issue 1

65-71

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.

Muscle Strength and Power of Elite Female and Male Swimmers

86%

Buśko K., Gajewski J.

Baltic Journal of Health and Physical Activity

2011

vol. 3

issue 1

13-18

Background: The aim of the study was to examine gender differences in the maximal power and height of rise of the body mass centre, measured in ACMJ (akimbo counter movement jump), BCMJ (bounce counter movement jump) and CMJ (counter movement jump) and maximal muscle torque in elite swimmers who have a similar training load during the season.Material/Methods: Eight male and eight female elite swimmers competing at the international level took part in the study. The maximal power and height of rise of the body mass center were measured at ACMJ, BCMJ and CMJ jumps performed on a dynamometric platform. Maximal muscle torques of elbow, shoulder, knee, hip and trunk flexors and extensors were measured under static conditions on a special stand.Results: Only differences in relative muscle torque of flexors of the left and the right hip, flexors and extensors of the right knee and flexors and extensors of the trunk, the sum of relative muscle torque of the trunk and relative maximal power output measured during BCMJ were not significant between the female and male competitors, while statistically significant differences were observed between the groups in all the remaining variables of physical performances.Conclusions: The results of the present study demonstrate that the male swimmers had much better performance than the female swimmers of comparable physical conditions, but when the results were calculated per body mass, gender differences in some the values were insignificant.

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1 Baltic Journal of Health and Physical Activity

1 Biomedical Human Kinetics

1 2013

1 2011

2 Buśko K.

2 Gajewski J.

1 Mazur-Różycka J.

1 Michalski R.

1 Różycki S.

1 Wietrzyński M.

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The assessment of muscle strength symmetry in kayakers and canoeists

Muscle Strength and Power of Elite Female and Male Swimmers