Long-term effects of moderate physical exercise during early childhood on insulin sensitivity in rats during adulthood

It is of great importance to investigate the effects of physical exercise for metabolic health when performed in early life, and what the adulthood response would be. The aim of this study is to analyse the effects of moderate intensity physical exercise protocol during childhood on the adipose tissue and insulin sensitivity of rats during adulthood. Twenty weaned Wistar (28 days old) were divided into control and trained groups. The Control Group was kept sedentary, and the Trained group was submitted to swimming exercise at 80% of the anaerobic threshold (determined by the lactate minimum test) for 1 hour/day, 5 days/week from 28 to 90 days of age. At the end of the experiment, the body weight, adiposity (adipose tissue weight), insulin sensitivity, glycemia, insulinemia, pancreatic insulin, lipogenic activity in mesenteric fat, lipogenic activity and glycogen store in gastrocnemius and glucose uptake by soleus were analyzed. Trained group showed lower body weight gain, fat acumulation, lipid synthesis, glycemia, insulinemia and pancreatic insulin level. Kitt, HOMA-IR, glycogen store in gastrocnemius and glucose uptake by soleus were higher in this group. Therefore, we conclude that the moderate physical exercise performed during childhood can contribute to the reduction of body fat and insulin resistance during adulthood in Wistar rats.É de grande importância a investigação dos efeitos do exercício para a saúde metabólica quando realizado no início da vida, e quais seriam as respostas durante a fase adulta. O objetivo desse estudo é analisar os efeitos do exercício físico de intensidade moderada durante a infância na adiposidade e sensibilidade à insulina de ratos durante a fase adulta. Vinte ratos Wistar desmamados de 28 dias de vida foram divididos em grupos Controle e Treinado. O grupo Controle permaneceu sedentário, enquanto o grupo Treinado realizou exercício de natação a 80% do limiar anaeróbio (determinado pelo teste de lactato mínimo) por 1hora/dia, 5dias/semana do 28º até o 90º dia de vida. No fim do experimento, a massa corporal, adiposidade, sensibilidade à insulina, glicemia, insulinemia, insulina pancreática, atividade lipogênica do tecido adiposo mesentérico, atividade lipogênica e estoques de glicogênio no músculo gastrocnêmio e captação de glicose pelo músculo sóleo foram analizadas. O grupo Treinado apresentou menor ganho de massa corporal, acúmulo de gordura, síntese de lipídios, glicemia, insulinemia e insulina pancreática. Kitt, HOMA-IR, estoques de glicogênio no gastrocnêmio e captação de glicose pelo sóleo foram maiores nesse grupo. Portanto, concluímos que o exercício físico moderado realizado durante a infância pode contribuir para a redução da adiposidade corporal e resistência à insulina durante a fase adulta em ratos Wistar

Heart Rate Variability And Plasma Biomarkers In Patients With Type 1 Diabetes Mellitus: Effect Of A Bout Of Aerobic Exercise

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)The aim of this study was to evaluate: (1) the cardiovascular parameters and plasma biomarkers in people with type 1 diabetes mellitus (T1DM) at baseline; and (2) the heart rate variability (HRV) and blood glucose in response to a session of aerobic exercise (AE) and during recovery period. Research design and methods: Adults (18-35 years) were divided into two groups: control (CT, n = 10) and T1DM (n = 9). Anthropometric, cardiovascular, and biochemical parameters, and aerobic capacity (indirect peak oxygen uptake, VO2peak) were evaluated at baseline. Thirty minutes of AE (40-60% intensity) was performed on a treadmill. Blood glucose and HRV were determined at rest, during AE, and during the recovery period. Results: Anthropometric measurements, cardiovascular parameters, aerobic capacity, and biochemical parameters were similar between the groups at baseline. In the T1DM group, blood glucose, glycated hemoglobin, and thiobarbituric acid reactive substances concentrations were increased while nitrite/nitrate (NOx-) levels were reduced. During AE, the magnitude of the reduction of blood glucose was greater than that during the recovery period in the T1DM group. The RR intervals and SDNN were reduced at rest as well as in the recovery period in T1DM subjects, whereas the RMSSD and pNN50 were only reduced during the recovery period. No changes were observed in low frequency (LF), high frequency (HF), and LF/HF ratio. Conclusion: Our study shows that T1DM patients on insulin therapy have poor blood glucose control with greater lipid peroxidation and lower NOx- levels, accompanied by an imbalance in autonomic function detected by the challenge of AE. (C) 2015 Elsevier Ireland Ltd. All rights reserved.1111927Sao Paulo Research Foundation [2011/17437-7, 2013/02960-1]Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Heart Rate Variability And Plasma Biomarkers In Patients With Type 1 Diabetes Mellitus: Effect Of A Bout Of Aerobic Exercise.

The aim of this study was to evaluate: (1) the cardiovascular parameters and plasma biomarkers in people with type 1 diabetes mellitus (T1DM) at baseline; and (2) the heart rate variability (HRV) and blood glucose in response to a session of aerobic exercise (AE) and during recovery period. Adults (18-35 years) were divided into two groups: control (CT, n=10) and T1DM (n=9). Anthropometric, cardiovascular, and biochemical parameters, and aerobic capacity (indirect peak oxygen uptake, VO2peak) were evaluated at baseline. Thirty minutes of AE (40-60% intensity) was performed on a treadmill. Blood glucose and HRV were determined at rest, during AE, and during the recovery period. Anthropometric measurements, cardiovascular parameters, aerobic capacity, and biochemical parameters were similar between the groups at baseline. In the T1DM group, blood glucose, glycated hemoglobin, and thiobarbituric acid reactive substances concentrations were increased while nitrite/nitrate (NOx(-)) levels were reduced. During AE, the magnitude of the reduction of blood glucose was greater than that during the recovery period in the T1DM group. The RR intervals and SDNN were reduced at rest as well as in the recovery period in T1DM subjects, whereas the RMSSD and pNN50 were only reduced during the recovery period. No changes were observed in low frequency (LF), high frequency (HF), and LF/HF ratio. Our study shows that T1DM patients on insulin therapy have poor blood glucose control with greater lipid peroxidation and lower NOx(-) levels, accompanied by an imbalance in autonomic function detected by the challenge of AE.11119-2