Efeito do grau de desidratação em respostas imunes após treino de judô de atletas do sexo feminino
Luminescence. 2012 Feb 24. doi: 10.1002/bio.2349. [Epub ahead of print]
Effects of dehydration on immune functions after a judo practice session
Chishaki T, Umeda T, Takahashi I, Matsuzaka M, Iwane K, Matsumoto H, Ishibashi G, Ueno Y, Kashiwa N, Nakaji S.
Source
Department of Social Medicine, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562, Japan; Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, 790-8587, Japan. nakaji@cc.hirosaki-u.ac.jp.Abstract
We investigated the effects of dehydration after a judo practice session on player muscle and immune functions. Subjects included 25 female university judoists. Investigations were performed before and after 2.5 h of regular judo practice. Body composition, serum enzymes (myogenic enzymes, immunoglobulins and complements), neutrophils counts, reactive oxygen species (ROS) production capability, and phagocytic activity (PA) were measured. Subjects were divided into two groups according to level of dehydration after practice (mild dehydration and severe dehydration groups) and results were compared. Creatine kinase was found to increase significantly after practice. In addition, neutrophil count also increased significantly after practice in both groups. The changing ratios of IgA, IgG and C3 observed in the mild dehydration group were significantly higher than those in the severe dehydration group. In the severe dehydration group, post-practice PA/neutrophil had decreased significantly. Significant positive correlations were found between severity of dehydration and changing ratios of IgA, IgG, IgM, C3, C4 and ROS production capabilities, whereas no significant association was seen with PA and/or serum SOD activity. These results suggest that dehydration resulted in immunosuppression, including decreased neutrophil function.Função cognitiva de idosos após prática de karatê
Front Psychol. 2012;3:40. Epub 2012 Feb 20.
Effects of cognitive, motor, and karate training on cognitive functioning and emotional well-being of elderly people.
Department of Sport Science, Institute of Sport Science and Institute of Psychology, University of Regensburg Regensburg, Germany.
Abstract
The present study investigated the influence of cognitive, motor, and Karate (accordingly the guidelines of the German-Karate-Federation, DKV) training on the cognitive functioning and mental state of older people between 67 and 93 years of age. The three training groups each consisted of 12 elderly participants; the waiting control group included 9 participants. Before the training, participants were evaluated with cognitive measurements (cognitive speed: number-connection test, number-symbol test; memory performance: digit-span test, blocking-tapping test, figure test) and a measurement of emotional well-being. After this pre-testing they participated the specific training in on average sixteen 1-h training sessions. The cognitive training exercised inductive thinking ability, the motor training worked on easy stretching and mobilization techniques, and the Karate training taught tasks of self-defense, partner training, and Katas. After completion of the training sessions, all tests were applied again. The results show no significant difference in cognitive improvement dependent on group between the three training conditions. However a significant improvement was found in the emotional mental state measurement for the Karate group compared to the waiting control group. This result suggests that the integrated involvement in Karate leads to a feeling of self-worth and that, even in elderly people, integration of new sports helps to improve quality of life.
Artigo sobre razão do torque isocinético, incluindo análise de judocas
J Sports Sci. 2012 Mar;30(6):547-53.
Isokinetic hamstrings-to-quadriceps peak torque ratio: The influence of sport modality, gender, and angular velocity.
Source
a Departamento de Fisiologia , Universidade Federal de São Paulo (UNIFESP) , São Paulo , Brazil.Abstract
Abstract The purpose of this study was to determine differences in hamstrings-to-quadriceps (H/Q) peak torque ratios evaluated at different angular velocities between men and women who participate in judo, handball or soccer. A total of 166 athletes, including 58 judokas (26 females and 32 males), 39 handball players (22 females and 17 males), and 69 soccer players (17 females and 52 males), were evaluated using an isokinetic dynamometer. The H/Q isokinetic peak torque ratios were calculated at angular velocities of 1.05 rad · s(-1) and 5.23 rad · s(-1). In the analysis by gender, female soccer players produced lower H/Q peak torque ratios at 1.05 rad · s(-1) than males involved in the same sport. However, when H/Q peak torque ratio was assessed at 5.23 rad · s(-1), there were no significant differences between the sexes. In the analysis by sport, there were no differences among females at 1.05 rad · s(-1). In contrast, male soccer players had significantly higher H/Q peak torque ratios than judokas (66 ± 12% vs. 57 ± 14%, respectively). Female handball players produced significantly lower peak torque ratios at 5.23 rad · s(-1) than judokas or soccer players, whereas males presented no ratio differences among sports At 5.23 rad · s(-1). In the analysis by velocity, women's muscular ratios assessed at 1.05 rad · s(-1) were significantly lower than at 5.23 rad · s(-1) for all sports; among men, only judokas presented lower ratios at 1.05 rad · s(-1) than at 5.23 rad · s(-1). The present results suggest that sport modality and angular velocity influence the isokinetic strength profiles of men and women.
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