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      Influência do índice glicêmico na glicemia em exercício físico aeróbico Translated title: The glycemic index influence on glucose in aerobic exercise

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          Abstract

          OBJETIVO: Avaliar a influência do índice glicêmico (IG) na resposta glicêmica antes e durante o exercício físico decorrente a diferentes sessões experimentais pré-exercício. MÉTODOS: Doze homens adultos realizaram três sessões experimentais pré-exercício: de alto índice glicêmico (AIG); de baixo índice glicêmico (BIG); e em estado de jejum, sendo nesta última oferecida duas formas diferenciadas de hidratação durante o exercício: água e bebida carboidratada. RESULTADOS: Durante o período de repouso, o tipo de refeição, de AIG ou de BIG, interferiu no comportamento da glicemia, ambas tendendo ao "efeito rebote". Durante o exercício, não foi observada diferença na resposta glicêmica entre as quatro ações testadas; contudo, a intervenção com bebida carboidratada manteve constante a glicemia ao longo dos 60 min do exercício. CONCLUSÃO: O IG é determinante na resposta glicêmica ao longo de uma hora antes do exercício, porém não interfere na resposta glicêmica durante a atividade.

          Translated abstract

          OBJECTIVE: Evaluate the influence of glycemic index (GI) on the glycemic response before and during the physical exercise after to different experimental sessions pre-exercise. METHODS: Twelve adult males performed three experimental sessions pre-exercise: of high glycemic index (HGI); of low glycemic index (LGI); In condition of fast, although this one take two different ways of hydration while the exercise: water and carbohydrate drink. RESULTS: During the repose period, the type of meal, even the HGI and also the LGI, interfered on glycemic's behavior, both tendency to the "Rebound Effect". During the exercise, it was not observed differences in glycemic answers between the four tested actions, although the intervention with CHO drink maintained constant blood along all 60 min of exercise. CONCLUSION: The GI is determinant in the glycemic response over an hour before exercise, but does not interfere in the glycemic response during the activity.

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          Normal standards for an incremental progressive cycle ergometer test.

          One hundred healthy subjects (50 male and 50 female), selected to provide an even distribution of age (15 to 71 yr) and height (165 to 194 cm in males and 152 to 176 cm in females), underwent a progressively incremental (100 kpm/min each min) exercise test to a symptom-limited maximum. Measurements were made of O2 intake and CO2 output, ventilation and breathing pattern, heart rate and blood pressure, and rating of perceived exertion. The ventilatory anaerobic threshold was identified. Predictive data were derived for measurements at maximal and submaximal exercise. Maximal power output (Wmax) and oxygen intake (VO2max) varied with sex (0, male; 1, female), age (yr), and height (Ht, cm): Wmax = 20.4 (Ht) - 8.74 (Age) - 288 (Sex) - 1,909 kpm/min (SEE, 216; r, 0.858); VO2max = 0.046 (Ht) - 0.021 (Age) - 0.62 (Sex) - 4.31 L/min (SEE, 0.458; r, 0.869). The extent of leisure time activity exerted a positive influence on VO2max (r, 0.47; p less than 0.001); VO2max was also related to lean thigh volume (r, 0.79). Maximal heart rate (HR) declined as a function of age: HRmax = 202 - 0.72 (Age) beats/min (SEE, 10.3; r, 0.72). Maximal O2 pulse (O2Pmax) was related to height and was systematically higher in males than in females: O2Pmax = 0.28 (Ht) - 3.3 (Sex) - 26.7 ml/beat (SEE, 2.8; r, 0.86). Ventilation was closely related to CO2 output, and the maximal tidal volume was related to vital capacity. The VO2 increased linearly with power throughout the test; in an individual subject, the intercept of this relationship was positively influenced by weight and height.(ABSTRACT TRUNCATED AT 250 WORDS)
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            Tracking of physical activity from adolescence to adulthood: a population-based study

            OBJECTIVE: To assess the association between regular physical activity in adolescence and leisure-time physical activity in adulthood, with emphasis on gender differences. METHODS: A population-based cross-sectional study was carried out in Pelotas, Southern Brazil, in 2003. A representative sample of households was selected in multiple stages and subjects aged 20-59 years were interviewed. Leisure-time physical activity was evaluated using the International Physical Activity Questionnaire. Data on adolescent physical activity were based on subjects' recall. RESULTS: Of 2,577 subjects interviewed, 27.5% were classified as adequately active, and 54.9% reported regular physical activity in adolescence. Subjects who engaged in regular physical activity during adolescence were more likely to be adequately active in adulthood (adjusted prevalence ratio 1.42; 95% CI: 1.23; 1.65). This effect was stronger in women (adjusted prevalence ratio: 1.51; 95% CI: 1.22; 1.86) than men (adjusted prevalence ratio: 1.35; 95% CI: 1.10; 1.67). CONCLUSIONS: Promoting physical activity in school age may be a successful intervention against the epidemic of adult inactivity. Although women were less likely to report regular physical activity in adolescence, the effect of this experience on adult behavior was stronger than in men.
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              Fisiologia do exercício: energia, nutrição e desempenho humano

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                motriz
                Motriz: Revista de Educação Física
                Motriz: rev. educ. fis.
                Universidade Estadual Paulista (Rio Claro )
                1980-6574
                September 2011
                : 17
                : 3
                : 395-405
                Affiliations
                [1 ] Universidade Federal de Viçosa Brazil
                [2 ] Universidade Federal de Viçosa Brazil
                Article
                S1980-65742011000300003
                10.1590/S1980-65742011000300003
                c0f60ba9-a7c5-467c-ae06-f23701ee52da

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1980-6574&lng=en
                Categories
                SPORT SCIENCES

                Sports medicine
                Dietary carbohydrates,Physical exercise,Fluid therapy,Blood glucose,Carboidratos na dieta,Exercício físico,Hidratação,Glicemia

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