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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.

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sexta-feira, 2 de novembro de 2012

Alterações fisiológicas durante a temporada de luta olímpica


 2012 Oct 16. [Epub ahead of print]

Effects of a competitive wrestling season on body composition, endocrine markers, and anaerobic exercise performance in NCAA collegiate wrestlers.

Source

Department of Health and Exercise Science, The College of New Jersey, Ewing, NJ, 08628, USA, ratamess@tcnj.edu.

Abstract

Few data exist examining the body composition, endocrine, and anaerobic exercise performance changes over a competitive wrestling season. Eighteen NCAA wrestlers were tested for endocrine markers, body composition, hydration, grip strength, and power on four occasions: prior to pre-season training (T1); after pre-season training 3 days prior to the first seasonal meet (T2); mid-season one day prior to a meet (T3); and at the end of the season 2-3 days following the last meet (T4). Body mass, percent body fat (BF %), and fat mass were significantly lower (P ≤ 0.05) at T2 and T3 compared to T1 but were not different between T1 and T4. Lean body mass was significantly reduced at T2 only. Urine specific gravity was significantly elevated at T3 compared to T1, T2, and T4. Resting cortisol concentrations did not change but resting testosterone concentrations were significantly reduced at T2, T3, and T4. Maximal grip strength was significantly reduced at T2. Vertical jump peak power was significantly reduced at T2, T3, and T4. Wingate peak power was significantly reduced at T2 and T3. However, Wingate average power and total work did not significantly change. Fatigue rate during the Wingate test was significantly improved at T2, T3, and T4 compared to T1. In conclusion, body mass, BF %, and measures of peak force and power were reduced for most of the competitive wrestling season. Competitive wrestling reduces resting total testosterone concentrations throughout the entire season.

quinta-feira, 1 de novembro de 2012

Determinantes psicológicos do rendimento de esgrimistas


SELECTED PSYCHOLOGICAL DETERMINANTS OF SPORTS RESULTS
IN SENIOR FENCERS
MACIEJ TOMCZAK*, MAŁGORZATA WALCZAK, GRZEGORZ BRĘCZEWSKI
University School of Physical Education, Poznań, Poland
AbSTrAcT
Purpose. The aim of the present study was to determine the correlations between the strength of the stimulation process,  mobility of nervous processes, achievement motivation and sports results of fencers in the senior age category. Methods. The sample was comprised of 38 senior fencers (19 men and 19 women) aged 21–32 years. The strength of the stimulation process and mobility of nervous processes were assessed with the Strelau and Zawadzki PTS inventory. The subjects’ achievement mo­ tivation was measured with the achievement motivation questionnaire by Widerszal­bazyl. Results. The study revealed that  senior fencers (women, in particular) featured higher mean levels of the examined psychological determinants, i.e., strength
of the stimulation process, mobility of nervous processes and achievement motivation than the general population in the same age range. Strong and statistically significant correlations were found between all the studied psychological determinants and sports results among the male fencers in the sample. In the group of female fencers none of the correlations were statistically significant. Conclusions. The results might provoke reflection on the role of coaches and, consequently, may have implications for the cooperation between coaches and athletes, indicating that the individual psychological differences of fencers should be considered during training. The coach may also decide on the necessity for considering on the reported diversification within the gender or age domain, and the need to consider such psychological properties as temperamental characteristics or the level of achievement motivation.

Key words: psychology, temperamental features, achievement motivation, fencing

quarta-feira, 24 de outubro de 2012

Uso de atividades motoras complexas no treinamento de boxeadores jovens


Technical performance effectiveness subsequent to complex motor skills training in young boxers

DOI:
10.1080/17461391.2011.606976
Said El Ashkera*
pages 475-484
Received: 07 Apr 2011
Accepted: 05 Jun 2011
Version of record first published: 01 Nov 2011
Article Views: 47

Abstract

Boxing is a sport that comprises a wide variety of integrated offensive, defensive and counter-attack skills performed in an unpredictable environment. Mastering the variety of complex motor skills (CMS) that are required in a boxing match allows the player to employ the best motor performance in most positions of the actual game. This study aimed to assess the associations between implementing CMS versus simple motor skill (SMS) training and the subsequent changes in physical, technical and technical performance effectiveness (TPE) variables in junior boxers. We employed an experimental design that comprised two groups (each 20 males, mean age = 15.22±0.62 years). For 12 weeks, intervention boxers received CMS training, while controls received traditional SMS training. Physical, technical and TPE variables were measured before and after the training programs. Although the two groups were of similar abilities at baseline, there were statistically significant differences (P<0 .05=".05" abilities="abilities" absolute="absolute" across="across" advantage="advantage" and="and" better="better" between="between" boxers="boxers" cms="cms" contribute="contribute" control="control" could="could" developing="developing" differences="differences" enhance="enhance" exhibited="exhibited" favourable="favourable" group.="group." group="group" i.e.="i.e." improvements="improvements" in="in" intervention="intervention" junior="junior" measures="measures" more="more" of="of" or="or" p="p" performance.="performance." physical="physical" positively="positively" post="post" ratios="ratios" relative="relative" technical="technical" terms="terms" the="the" their="their" to="to" tpe.="tpe." values="values" variables="variables">