AVALIAÇÃO DA PRODUÇÃO DE FORÇA EM NADO AMARRADO E EM SECO: RELAÇÃO COM A PERFORMANCE DESPORTIVA; DIFERENÇAS BILATERAIS DE FORÇA E INDICADORES DE CAPACIDADE ANAERÓBIA

Publicações

Quantification of upper limb kinetic asymmetries in front crawl swimming

Publication . Morouço, Pedro; Marinho, Daniel A.; Fernandes, Ricardo J.; Marques, Mário C.

This study aimed at quantifying upper limb kinetic asymmetries in maximal front crawl swimming and to examine if these asymmetries would affect the contribution of force exertion to swimming performance. Eighteen high level male swimmers with unilateral breathing patterns and sprint or middle distance specialists, volunteered as participants. A load-cell was used to quantify the forces exerted in water by completing a 30. s maximal front crawl tethered swimming test and a maximal 50. m free swimming was considered as a performance criterion. Individual force-time curves were obtained to calculate the mean and maximum forces per cycle, for each upper limb. Following, symmetry index was estimated and breathing laterality identified by questionnaire. Lastly, the pattern of asymmetries along the test was estimated for each upper limb using linear regression of peak forces per cycle. Asymmetrical force exertion was observed in the majority of the swimmers (66.7%), with a total correspondence of breathing laterality opposite to the side of the force asymmetry. Forces exerted by the dominant upper limb presented a higher decrease than from the non-dominant. Very strong associations were found between exerted forces and swimming performance, when controlling the isolated effect of symmetry index. Results point that force asymmetries occur in the majority of the swimmers, and that these asymmetries are most evident in the first cycles of a maximum bout. Symmetry index stood up as an influencing factor on the contribution of tethered forces over swimming performance. Thus, to some extent, a certain degree of asymmetry is not critical for short swimming performance.

2015-04Artigo científico

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Relative Contribution of Arms and Legs in 30 s Fully Tethered Front Crawl Swimming

Publication . Morouço, Pedro, G.; Marinho, Daniel A.; Izquierdo, Mikel; Neiva, Henrique; Marques, Mário C.

The relative contribution of arm stroke and leg kicking to maximal fully tethered front crawl swimming performance remains to be solved. Twenty-three national level young swimmers (12 male and 11 female) randomly performed 3 bouts of 30 s fully tethered swimming (using the whole body, only the arm stroke, and only the leg kicking). A load-cell system permitted the continuous measurement of the exerted forces, and swimming velocity was calculated from the time taken to complete a 50 m front crawl swim. As expected, with no restrictions swimmers were able to exert higher forces than that using only their arm stroke or leg kicking.

2015Artigo científico

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Palavras-chave

, Medical and health sciences ,Medical and health sciences/Health sciences

Entidade financiadora

Fundação para a Ciência e a Tecnologia, I.P.
Fundação para a Ciência e a Tecnologia, I.P.

Programa de financiamento

FARH

Número da atribuição

SFRH/BD/66910/2009