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Quem sou eu

São Paulo, São Paulo, Brazil
Professor da EEFE-USP; Praticante e Pesquisador de Judô; Preparador físico de atletas de modalidades esportivas de combate.

Arquivo do blog

sábado, 19 de fevereiro de 2011

Resumo sobre vibração e terapia magnética em atletas de judô

Vopr Kurortol Fizioter Lech Fiz Kult. 2010 Sep-Oct;(5):24-7.

[The influence of vibration training in combination with general magnetotherapy on dynamics of performance efficiency in athletes].
Abstract
The objective of this study was to evaluate effects of a combined treatment including vibrostimulation and magnetotherapy on the working capacity of athletes. Participants of the study were 8 male judo wrestlers. It was shown that implementation of a specialized training program comprising seances of vibration loading and general magnetotherapy 40 and 60 min in duration respectively during 3 consecutive days produced marked beneficial effect on the hormonal status of the athletes. Specifically, the three-day long treatment resulted in a significant increase of blood cortisol and testosterone levels considered to be an objective sign of improved performance parameters in athletes engaged in strength and speed sports. The optimal length of vibration training during 3 days of specialized training is estimated at 20 to 40 minutes supplemented by general magnetotherapy for 60 minutes.

Polimorfismo em atletas de combate

European Journal of Sport Science
Variation in peroxisome proliferator activated receptor gene in elite combat athletes

Authors: Pawel Cieszczyka; Marek Sawczukb; Agnieszka Maciejewskab; Krzysztof Ficekc; Jerzy Eidera
Abstract
Peroxisome proliferator activated receptor (PPAR) is a main regulator of energy metabolism, as it regulates the expression of genes encoding several key muscle enzymes involved in fatty acid oxidation. Importantly for power sports, it may affect pathways of glucose metabolism, which can be critical in power-based sports. The aim of this study was to analyse the distribution of the PPAR gene polymorphisms in mixed power/endurance athletes. The study was carried out on elite combat athletes and sedentary individuals, in an attempt to determine possible relationships between genotype and physical performance. We tested 60 male elite Polish combat athletes. Control samples came from 181 unrelated sedentary volunteers. The G/C polymorphic site in PPAR intron 7 was scanned using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) protocol with TaqI enzyme. Differences in the distribution frequency of this polymorphism were assessed by chi-square analysis. The results revealed that frequencies of the PPAR GG genotype (73.33% vs. 54.70%; P=0.04) and G allele (82.50% vs. 70.17%; P=0.01) were significantly higher in the elite combat athletes compared with sedentary controls. The results confirm the significance of the PPAR gene as a useful genetic marker in combat athletes. However, these results should be supported with more experimental data on PPAR polymorphisms with larger groups of elite athletes.

sexta-feira, 18 de fevereiro de 2011

Perda de peso e uso de suplementos em atletas de luta

Dica do Fabrício:
Sports Med Arthrosc Rehabil Ther Technol. 2011 Feb 12;3(1):4. [Epub ahead of print]
Patterns of weight loss and supplement consumption of male wrestlers in Tehran.
Kordi R, Ziaee V, Rostami M, Wallace WA.
ABSTRACT:
BACKGROUND: To evaluate the weight loss behavior of male wrestlers in Tehran.
METHODS: This study was a population-based cross sectional survey. Subjects were 436 wrestlers randomly selected from the wrestling clubs in Tehran employing cluster sample setting method. Subjects were interviewed based on a designed questionnaire. Body fat levels were measured based on skin fold measurements.
RESULTS: Weight loss methods practiced by 62% of all subjects during the previous year employing rapid ([less than or equal to]7days before the matches) and gradual (>7 days before the matches) weight reduction methods (73% and 34% of wrestlers who reduced their weight respectively). In addition, opinions on weight reduction, the methods of weight loss used, and the side effects of the weight loss practices as well as consumption of supplements among the subjects were reported in this study. The mean percentage of body fat of subjects was 15.9%.
CONCLUSIONS: Rapid weight loss for matches and the use of unsafe methods of weight reduction such as fasting, and fluid reduction methods as well as acute side effects of weight loss were prevalent among wrestlers in Tehran. Some preventive measures including education and new rules such as scheduling weigh-ins immediately prior to the competitions and mat-side weigh-in are needed to prevent these unhealthy practices. The weight loss behaviors of these wrestlers should be changed from using dehydration methods to using gradual methods of weight loss.