Joris Pazin

Influência da maturação sexual, idade cronológica e índices de crescimento no limiar de lactato e no desempenho da corrida de 20 minutos

Children and adolescents present less blood lactate concentrations ([la]) than adults under certain loads. It is suggested that these differences are related to maturational aspects. The aim of this study was to verify the influence of sexual maturation, chronological age and growth indices (body weight, height and sum of two skinfolds – subscapular and triceps) over the lactate threshold velocity, in the fixed lactate concentration of 2.5 mmol.l-1 (V 2,5 ) and in the 20 minutes running (V 20 ). Thirty-three boys, aged 13-15 years, who practice different sports were submitted to: 1) anthropometrical and sexual maturation evaluations through the Tanner index (sexual maturation of genitals and pubic hair); 2) progressive discontinuous test (3 x 800 m in running track) to determine V 2,5 ; and 3) 20 minutes running test to determine the V 20 and final blood [la]. There were no associations between V 2,5 and sexual maturation, neither chronological age nor growth index. As the only association verified was between V 20 and height (r = 0,41; p < 0,05), the authors conclude that during adolescence other performance, physiological and/or biomechanical variables may play a greater role in lactate threshold and in the 20 minutes running than the growth variables.

Atividade física no lazer, deslocamento, apoio social e percepção do ambiente urbano em homens e mulheres de Florianópolis/SC

The aim of the study was to identify characteristics of the perceived physical environment and social support associated with physical activity during leisure (LFA), and transportation (TFA) in man and women. The study was based on a systematic sample of 746 residents in Florianopolis, SC, Brazil, obtained by phonebook. We utilized the long version of International Physical Activity Questionnaire (IPAQ), and the scale of active mobility in the community environment (news adapted). The outcomes investigated were not meeting the recommendations for physical activity (NARAF) in LFA and TFA in man and women. As explanatory variables we investigated the characteristics of socio-demographic variables, perception of the environment, general health, and body mass index (IMC). We performed logistic regression analysis to estimate the odds ratios and the adjusted attributes of the physical environment and social support of man and women that NARAF. The response rate was 91% (n = 746). The prevalence of women in NARAF in transportation was 73.3% (69.1-77.5%) and for men was 71.1% (66.1 to 76.2%). In the LFA NARAF prevalence of women was 78.4% (74.5-78.3%) and 74.9% (70.1-79.7%) in men. In TFA environmental attributes associated with less chance of NARAF were: live in an area close to shopping areas, gym and bank branch close to home. In the LFA, street lighting, security during the day, walking site close to home and live near the coastline. Programs to promote AFL in adults should consider variables of the urban environment (lit streets, safety, local walking or physical activity and attractiveness of locations). To promote the TFA should be considered public and private structures (proximity to shopping areas, gyms, banks and attractiveness of locations).

Factors associated to usual physical activity in women

INTRODUCCION: los estudios han sido dirigidos a investigar la prevalencia de actividad fisica AF en diferentes poblaciones.OBJETIVO: Analizar los factores asociados con la practica habitual de actividad fisica en las mujeres de regiones de Santa Catarina, Brasil.METODOS: este estudio transversal obtuvo muestra de 2750 mujeres con edad promedio de 32,97 ± 10,9 anos. La AF se evaluo mediante el Cuestionario Internacional de Actividad Fisica IPAQ. La muestra fue dividida en seis grupos: Region Sur; Valle de Itajai; Region Norte; Region Occidental; Region Montanosa y Gran Florianopolis. El analisis estadistico fue descriptivo e inferencial.RESULTADOS: aproximadamente el 68,3% de las mujeres se consideraron suficientemente activas activa + muy activa, destacando la region de la Gran Florianopolis, SC, Brasil. En la practica de actividad moderada y moderada + vigorosa, las mujeres de la Region Occidental presentaron los promedios mas altos 65 ± 64; 105 ±102 min./dia, respectivamente, y las de 20 a 32 anos tenian 61% de probabilidad de ser consideradas activas en comparacion con las mujeres de 46 a 59 anos. En cuanto el indice de masa corporal IMC, las mujeres con peso normal de las Region Sur y del Valle de Itajai, presentaron 2,24 IC del 95%; 1,15-4,35 y 1,76 IC del 95%; 1,14-2,73 veces mas probabilidades de ser activas en comparacion con las mujeres con sobrepeso.CONCLUSION: las mujeres en las regiones de Santa Catarina se consideraron suficientemente activas. La actividad fisica moderada + vigorosa fue la mas prevaleciente en las seis regiones estudiadas.

Physical activity associated with urban environmental characteristics: A correlational study of active women of high socioeconomic status from Brazilian cities of Santa Catarina

O estudo buscou identificar caracteristicas do ambiente urbano que podem estar associadas ao nivel de atividade fisica (AF) de mulheres de cidades catarinenses. A amostra foi composta por 2047 mulheres de 20 a 59 anos de seis cidades catarinenses: Blumenau, Chapeco, Criciuma, Florianopolis, Itajai e Sao Jose. A AF foi avaliada por meio do International Physical Activity Questionnaire (versao curta) e o Neighborhood Environmental Walkability Scale para variaveis ambientais. Utilizou-se estatistica descritiva e inferencial: Teste do Qui quadrado, ANOVA acompanhada de post hoc e analise de regressao multinomial bruta e ajustada (p < 0,05). As mulheres da cidade de Sao Jose apresentaram maiores chances para pratica de AF quando residem proximas a locais apropriados, calcadas, academias, ruas iluminadas e quando recebem convites de parentes para pratica. A existencia de Programa de AF para comunidade possibilitou maiores chances de pratica para mulheres de Florianopolis, Sao Jose, Criciuma e Blumenau. Nas cidades de Florianopolis e Chapeco, os fatores influenciaveis foram respectivamente, beira mar∕orla maritima e o convite de parentes para a caminhada. Alguns fatores do ambiente pareceram influenciar positivamente a pratica de AF das mulheres catarinenses. Alem disso, o fato de pertencerem ao estrato economico alto pode aumentar a pratica, uma vez que as mesmas parecem ter maior acesso as academias e profissionais particulares.

Influencia de la madurez sexual, edad cronológica e índices de crecimiento en el límite de lactato y en el desempeño en carreras de velocidad de 20 minutos

Children and adolescents present less blood lactate concentrations ([la]) than adults under certain loads. It is suggested that these differences are related to maturational aspects. The aim of this study was to verify the influence of sexual maturation, chronological age and growth indices (body weight, height and sum of two skinfolds – subscapular and triceps) over the lactate threshold velocity, in the fixed lactate concentration of 2.5 mmol.l-1 (V 2,5 ) and in the 20 minutes running (V 20 ). Thirty-three boys, aged 13-15 years, who practice different sports were submitted to: 1) anthropometrical and sexual maturation evaluations through the Tanner index (sexual maturation of genitals and pubic hair); 2) progressive discontinuous test (3 x 800 m in running track) to determine V 2,5 ; and 3) 20 minutes running test to determine the V 20 and final blood [la]. There were no associations between V 2,5 and sexual maturation, neither chronological age nor growth index. As the only association verified was between V 20 and height (r = 0,41; p < 0,05), the authors conclude that during adolescence other performance, physiological and/or biomechanical variables may play a greater role in lactate threshold and in the 20 minutes running than the growth variables.

Influence of sexual maturation, chronological age and growth indices in lactate threshold and performance in the 20 minutes running

Children and adolescents present less blood lactate concentrations ([la]) than adults under certain loads. It is suggested that these differences are related to maturational aspects. The aim of this study was to verify the influence of sexual maturation, chronological age and growth indices (body weight, height and sum of two skinfolds – subscapular and triceps) over the lactate threshold velocity, in the fixed lactate concentration of 2.5 mmol.l-1 (V 2,5 ) and in the 20 minutes running (V 20 ). Thirty-three boys, aged 13-15 years, who practice different sports were submitted to: 1) anthropometrical and sexual maturation evaluations through the Tanner index (sexual maturation of genitals and pubic hair); 2) progressive discontinuous test (3 x 800 m in running track) to determine V 2,5 ; and 3) 20 minutes running test to determine the V 20 and final blood [la]. There were no associations between V 2,5 and sexual maturation, neither chronological age nor growth index. As the only association verified was between V 20 and height (r = 0,41; p < 0,05), the authors conclude that during adolescence other performance, physiological and/or biomechanical variables may play a greater role in lactate threshold and in the 20 minutes running than the growth variables.