Abstract
Exercise testing was used to examine 19 cardiorespiratory diabetes mellitus patients, aged 32-68 years (body mass index, 27.8 +/- 4.8 kg/m2), and 16 healthy volunteers, aged 23-57 years (body mass index, 22.7 +/- kg/m2). A graded cycling exercise test was done, monitoring gas exchange, ventilation and heart rate. Values were significantly higher in the non-insulin-dependent diabetes mellitus (NIDDM) patients than in the controls for fasting blood glucose (P < 0.01), glycosylated haemoglobin (P < 0.01), body weight (P < 0.05) and body mass index (P < 0.05). The exercise testing produced values that were significantly lower in the patients with NIDDM than in the controls for percentage oxygen uptake (P < 0.05), maximum load (P < 0.05), maximum metabolic equivalent (P < 0.01) and maximum oxygen uptake per unit body weight (P < 0.01). Ventilatory capacity and forced expiratory volume at 1 sec did not differ significantly in the two groups. These results suggest that general fitness is diminished due to reduced cardiorespiratory function in patients with NIDDM.
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