Comparação dos indicadores funcionais e bioquimicos em homens de meia-idade submetidos a treinamento aerobio e corredores de longa distancia / Comparison of functional and biochemical indicators in middle aged men undergoing aerobic training and long distance runners

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

21/07/2009

RESUMO

The advancement of age combined with physical inactivity contribute to the emergence of a number of metabolic diseases among which are included; arterial hypertension, obesity, syndrome of insulin resistance and dyslipidemia. These could lead to a metabolic syndrome (MS) and increase the risks of developing diabetes and cardiovascular diseases. Thus, this study aims at investigating whether short periods of intervention with aerobic training of low to moderate intensities can promote changes in markers of risks of cardiovascular diseases in middle-aged men. Furthermore, we try to compare these changes with individuals of the same age who have been practitioners of regular aerobic training for several years (long-distance runners). The sample was composed of two groups of males of middle age, with one group (n = 15) 46,45 ± 4,50 years, 173,59 ± 7,52 cm subjected to an aerobic training with intensities between 60% and 80% of VO2peak for 16 weeks with 3 sessions per week and assessed in two distinct moments: pre-aerobic training (PRE-TA) and post-aerobic training (POST-TA). The total body mass for the PRE-TA sample populations is 80,77 ± 8,67 kg and that for POST-TA is 78,83 ± 9,01 kg. A second group studied was the long-distance runners (C) (n = 21), 47,43 ± 5,77 years, total body mass 66,97 ± 10,56 kg, 171,05 ± 7,47 cm, with an average of 15,38 ± 8,94 years of weekly training across an estimated distance of 62,95 ± 32,04 kilometers with an average time of performance for 10km of 45 36"± 6 32". The study directly assessed the maximum oxygen uptake (VO2peak.), body composition, lipid profile, CRP, glycated hemoglobin, fasting glucose, basal insulin and insulin resistance which was estimated using the Homeostasis Model Assessment method (HOMA-IR). Statistical analysis was performed between groups and within groups, and adopted a value of 0,05. A significant difference was observed between the group PRE and POST-TA-TA, with reduction of the values for the variables: total body mass (p=0,011), BMI (p=0,011),% fat (p=0,023), fat mass (p=0,012), waist circumference (p=0,001), total cholesterol (p=0,009), LDL (p=0,038), basal insulin (p=0,036) and glycated hemoglobin (p=0,031) and increase in the maximum oxygen (p=0,000). However, for lean mass, HDL, triglycerides, blood glucose, HOMA and CRP were not statistically significant difference. When compared POST-TA and runners not only statistical differences were observed for the MM, total cholesterol, LDL, triglycerides, glucose and CRP, with lower values for the group of runners with the exception of higher VO2peak and HDL. Middle-aged subjects showed positive changes in markers of risk of cardiovascular disease after the completion of only 16 weeks of aerobic training. However, individuals who perform TA for years in higher training intensities have demonstrated benefits of exercise even greater. These data indicate the important role of physical exercise, to a lesser or greater quantity and intensity, as flags of the control of risk factors for the development of diseases associated with metabolic syndrome.

ASSUNTO(S)

exercícios aeróbicos homens de meia-idade corridas sedentarismo lipidios - metabolismo resistência à insulina aerobic training men of middle age running sedentary lipids resistant to insulin

ACESSO AO ARTIGO

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