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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Efeitos da perda de peso r??pida sobre a contagem de leuc??citos, hidrata????o e for??a muscular em lutadores de artes marciais mistas

Camar??o, Nathalia Ferreira 11 February 2016 (has links)
Submitted by Kelson Anthony de Menezes (kelson@ucb.br) on 2016-11-03T12:31:51Z No. of bitstreams: 1 NathaliaFerreiraCamarcoDissertacao2016.pdf: 487096 bytes, checksum: 541fd08fa9f79c48d28bb15be0b9861d (MD5) / Made available in DSpace on 2016-11-03T12:31:51Z (GMT). No. of bitstreams: 1 NathaliaFerreiraCamarcoDissertacao2016.pdf: 487096 bytes, checksum: 541fd08fa9f79c48d28bb15be0b9861d (MD5) Previous issue date: 2016-02-11 / MMA championships are bounded by weight category. Athletes re usually mantain bodyweight above the limit of category and pratice rapid wight loss for the weight-in moment, with subsequent weight regain until the moment of the combat. Therefore, the aim of this study was to investigate hidration status, immue parameters, and isometric strenght in professional MMA fighters who underwent smaller (group 1, n = 6) or greater (group 2, n = 6 ) rapid weight loss in two momwnts: at weigh-in and immediately prior to the competition. We used blood tests to quantify the total and differential leukocyte count,, handgrip strength test and verified variation among the usual weight and weight at the time of the fight. Groups were divided establishing percentile 50%, considering delta perceptual of weight loss from the usual weight and weigh-in weight. Even after verify normality of the sample distributionby the Shapiro-Wilk test, we decided to use non-parametric statistical analysis, given the fact the sample size. We used Mann-Whitney test to verify thedifference between groups and Wilcoxon test to verify the difference between moments. . Values are expressed as median, mean ?? standard deviation. The median and the average percentage of weight loss delta are statistically different between the groups (p???0,05). Group 1: median = 5.54, mean = 6.45 ?? 3.98%, and Group 2: median = 12, 99, mean = 14.23 ?? 2.52%. The groups are homogeneous in the following variables: age (Group 1: median = 22, mean = 26.5 ?? 11.30 years; Group 2: median = 27, mean = 27.5 ?? 2.35 years); height (Group 1: median 174.5, mean = 176.8 ?? 0.06 cm; Group 2: median = 176, mean = 177.2 ?? 0.04 cm); BMI (Group 1: median = 25.17, mean = 25.23 ?? 2.71 kg / m 2, Group 2: median = 25, 06, mean = 25.54 ?? 1.26 kg / m2) body weight (Group 1: median 78.5, mean = 78.67 ?? 6.15 kg; Group 2: median 79.0, mean = 80.17 ?? 4,83kg). Between groups, we observed total leukocytes decreased in Group 1 (median = 8850, 11450 = maximum value, minimum value = 4850, mean = 8408.44 ?? 2585.6 mm3) compared to Group 2 ( median = 8300, maximum = 17400, minimum value = 4200, mean = 9208.3 ?? 4732.1 mm3) at the of weigh-in, with statistically significant difference (p <0.05).No significant differences between groups and moments were found for neutrophils, lymphocytes and neutrophil/lymphocyte ratio. Furthermore, no significant differences were observed on absolute and relative isometric handgrip strength between groups and moments. In conclusion, greater rapid wight loss can transiently downregulate immune parameters. We elucidate the needin of rules to determinate maximum values of weight loss and regain prior to championships. / As competi????es de MMA s??o delimitadas por categorias de peso. Grande parte dos atletas costuma manter seu peso corporal usual acima do limite da categoria que lutam, perdendo grande quantidade de peso para a pesagem, com subsequente recupera????o do peso perdido at?? o momento da luta. Portanto, o objetivo do presente estudo foi verificar, no momento da pesagem e imediatamente anterior ?? competi????o, a hidrata????o, par??metros imunes, e desempenho em lutadores profissionais de MMA que realizaram perda de peso r??pida pr??-competitiva, em menor (Grupo 1, n = 6) ou maior (Grupo 2, n = 6) escala, por meio de an??lises sangu??neas para quantifica????o total e diferencial de leuc??citos, for??a de preens??o palmar e varia????o entre o peso usual e peso no momento da luta. A divis??o dos grupos foi feita estabelecendo percentil 50%, considerando o delta percentual de perda de peso entre o peso usual e peso de pesagem. Mesmo ap??s verifica????o da normalidade da distribui????o da amostra por meio do teste Shapiro Wilk optou-se por utilizar an??lise estat??stica n??o param??trica U de Mann-Whitney para verificar a diferen??a de m??dias entre os grupos e teste de Wilcoxon para verificar a diferen??a entre momentos, haja visto o tamanho da amostra. Os valores est??o expressos em mediana, m??dia ?? desvio padr??o. As medianas e as m??dias do delta percentual de perda de peso foram estatisticamente diferentes (p???0,05) entre os grupos, sendo que no Grupo 1: mediana = 5,54, m??dia = 6,45 ?? 3,98% e no Grupo 2: mediana = 12,99, m??dia = 14,23 ?? 2,52%. Os grupos apresentam valores homog??neos nas seguintes vari??veis: idade (Grupo 1: mediana = 22, m??dia = 26,5 ?? 11,30 anos; Grupo 2: mediana = 27, m??dia = 27,5 ?? 2,35 anos); estatura (Grupo 1: mediana = 174,5, m??dia = 176,8 ?? 0,06 cm; Grupo 2: mediana = 176, m??dia = 177,2 ?? 0,04 cm); IMC (Grupo 1: mediana = 25,17, m??dia = 25,23 ?? 2,71 kg/m2; Grupo 2: mediana = 25, 06, m??dia = 25,54 ?? 1,26 kg/m2), peso corporal usual (Grupo 1:mediana = 78,5, m??dia = 78,67 ?? 6,15 kg; Grupo 2:mediana = 79,0, m??dia = 80,17 ?? 4,83kg). Em compara????o entre os dois grupos, observou-se valores de leuc??citos totais diminu??dos no Grupo 1 (mediana = 8850, valor m??ximo = 11450, valor m??nimo = 4850, m??dia = 8408,44 ?? 2585,6 mm3) em rela????o ao Grupo 2 (mediana = 8300, valor m??ximo = 17400, valor m??nimo = 4200, m??dia = 9208,3 ?? 4732,1 mm3), no momento da pesagem, com diferen??a estatisticamente significativa (p<0,05) para os testes n??o param??tricos. Nos neutr??filos, linf??citos e raz??o neutr??filo/linf??cito n??o foram observadas diferen??as significativas entre os grupos e momentos. N??o foram observadas diferen??as significativas na for??a de preens??o palmar absoluta e relativa no dia da pesagem e luta entre os grupos nos momentos. Conclui-se que a perda de peso r??pida pode influenciar par??metros imunes de forma transit??ria. Salienta-se a import??ncia de regras que determinem valores m??ximos de perda e recupera????o de peso nos campeonatos.

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