Pesquisar este blog



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

quinta-feira, 3 de dezembro de 2009

Mais um artigo do Guilherme Artioli no medline. Esse sairá no MSSE

Vale ressaltar que esse é o primeiro grande levantamento sobre a prevalência, magnitude e métodos de "perda de peso" entre atletas de judô. Os resultados têm implicações diretas em estratégias para combater esses procedimentos.

Med Sci Sports Exerc. 2009 Nov 23. [Epub ahead of print]

Prevalence, Magnitude and Methods of Rapid Weight Loss among Judo Competitors.
Artioli GG, Gualano B, Franchini E, Scagliusi FB, Takesian M, Fuchs M, Lancha Junior AH.
1Laboratory of Applied Nutrition and Metabolism. School of Physical Education and Sports. University of São Paulo
2Martial Arts and Combat Sports Research Group. School of Physical Education and Sports. University of São Paulo
3Department of Health Sciences. Federal University of São Paulo.

PURPOSE:: To identify the prevalence, magnitude and methods of rapid weight loss among judo competitors. METHODS:: Athletes (607 males and 215 females; age: 19.3+/-5.3 years; weight: 70+/-7.5 kg; height: 170.6+/-9.8 cm) completed a previously validated questionnaire developed to evaluate rapid weight loss in judo athletes, which provides a score. The higher the score obtained, the more aggressive the weight loss behaviors. Data were analyzed using descriptive statistics and frequency analyses. Mean scores obtained in the questionnaire were used to compare specific groups of athletes using, when appropriate, Mann-Whitney U test or GLM one-way ANOVA followed by Tamhane post-hoc test. RESULTS: Eighty-six percent of athletes reported that have already lost weight to compete. When heavyweights are excluded, this percentage rises to 89%. Most athletes reported reductions of up to 5% of body weight (mean+/-SD: 2.5+/-2.3%). The most weight ever lost was 2-5% while a great part of athletes reported reductions of 5-10% (mean+/-SD: 6+/-4%). The number of reductions underwent in a season was 3+/-5. The reductions usually occurred within 7+/-7 days. Athletes began cutting weight at 12.6+/-6.1 years. No significant differences were found in the score obtained by male vs female athletes as well as by athletes from different weight classes. Elite athletes scored significantly higher in the questionnaire than non-elite. Athletes who began cutting weight earlier also scored higher than those who began later. CONCLUSION:: Rapid weight loss is highly prevalent in judo competitors. The level of aggressiveness in weight management behaviors appears to not be influenced by the gender or by the weight class but it seems to be influenced by competitive level and by the age at which athletes began cutting weight.

3 comentários:

  1. O gui tá fera demais nessa brincadeira!
    Vc viu esse?

    Utter AC, Lambeth PG. Evaluation of Multi-Frequency BIA in Assessing Body Composition of Wrestlers. Med Sci Sports Exerc. 2009 Nov 13. [Epub ahead of print]

    PURPOSE:: to evaluate the accuracy of multi-frequency bioelectrical impedance analysis (MFBIA) in assessing fat-free mass (FFM) in comparison with hydrostatic weighing (HW) and skinfolds (SK) in high school wrestlers in a hydrated state. METHODS:: Body composition was determined by MFBIA, HW, and 3-site SK in 72 high school wrestlers (mean +/- SD, age: 15.3 +/- 1.4 yr, height: 1.71 +/- 0.08 m, body mass: 67.3 +/- 13.4 kg). Hydration state was quantified by evaluating urine specific gravity. RESULTS:: There were no significant differences for estimated FFM between MFBIA (57.2 +/- 9.5 kg) and HW (57.0 +/-10.1 kg) or SK (56.4 +/- 8.8 kg). The standard errors of estimate for FFM with HW as the reference method were 2.73 kg for MFBIA and 2.66 kg for SK. Correlations were found for FFM between HW and MFBIA (r = 0.96, P < 0.001), and between HW and SK (r = 0.97, P < 0.001). A systematic bias was found for MFBIA, as the difference between MFBIA and HW correlated with the FFM average of the two methods (r = - 0.22, P < 0.001). A bias was also seen between SK and HW and correlated with the FFM average (r = - 0.47, P < 0.001). CONCLUSION:: This study demonstrates that MFBIA provides similar estimates of FFM when compared with HW in a heterogeneous high school wrestling population during a hydrated state. MFBIA is an attractive assessment tool, easy to use, and may be considered as an alternative field-based method of estimating the FFM of high school wrestlers.

  2. :Esse é de periodização no kung-fu

  3. Olha esse:


    Algum tempo arás voce disse algo sobre ele!