ABSTRACT
Introduction:
Physical exercise is an important factor in the treatment of diabetes mellitus.
Objective:
To verify the acute effect of intermittent exercises on blood glucose and oxidation of energetic substrates in adolescents with type 1 diabetes.
Methods:
We evaluated 10 diabetic adolescents aged 10 to 15 years. Anthropometric measurements, glycosylated hemoglobin (HbA1c), VO2max, and the intermittent exercises test were evaluated. In this test, subjects continued pedaling for 30 minutes on a cycle ergometer with a load of 60% of VO2max, interspersed with maximum intensity sprints of 10 seconds every 5 minutes. The energetic substrates were evaluated during the test and the capillary blood glucose was measured before, immediately after exercise, and 30 minutes later. We observed a mean reduction in blood glucose of 39.2 ± 41.92 mg/dl, that is, an average of 21.61% of initial blood glucose. There was a significant difference (0.0001) between the oxidized energetic substrates, predominating the use of CHO. There is a strong direct correlation between HbA1c and the BMI z score (r = 0.821, p = 0.004) and between HbA1c and glucose observed post-exercise (r = 0.702, p = 0.024), and there is a strong correlation between pre-exercise and post-exercise glucose (r = 0.851, p = 0.002) and between post-exercise and 30 minutes after exercise (r = 0.874, p = 0.001). The linear regression test showed that BMI z score accounts for 67% of the HbA1c values (r² = 0.675).
Results:
According to the results observed, 30 minutes of intermittent aerobic exercises interspersed with short sprints of 10 seconds promoted a mean reduction of 21% in blood glucose with tendency to increase in the recovery phase. The predominant energetic substrates in the activity are carbohydrates (CHO).
Conclusion:
The better the adolescent BMI z score, the better glycemic control in adolescents with type 1 diabetes is expected.
Keywords:
carbohydrate metabolism; diabetes mellitus; oxidation.
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