The purpose of this investigation was to determine the effects of a regular vigorous physical activity program on children aged 5–11 yr with insulin-dependent diabetes mellitus (IDDM). The experimental group of children (N = 9) took part in a 30-min vigorous exercise program three times a week for 12 wk; the control group (N = 10) did not. Hemoglobin A1 (HbA1) and fasting blood glucose (FBG) were used to determine metabolic control. Oxygen consumption was evaluated by treadmill testing and analyses of expired air. The experimental group significantly (P < 0.05) decreased their HbA1 and FBG while the control group showed no change. The experimental group significantly (P < 0.05) increased their peak aerobic capacity (ml/kg min) when compared with baseline values (47.14 ± 1.94 versus 50.69 ± 1.30). It was concluded that a carefully applied program of regular vigorous physical activity can beneficially influence metabolic control and cardiovascular fitness in young children with IDDM.

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