Aims:The aim of this study was to evaluate the effect of combined resistance and home-based walking exercise on glycemic and metabolic control, depression and quality of life in type-2 diabetes patients.Methods:This prospective study was conducted at a private hospital in Turkey. Thirty-six type-2 diabetic patients participated in the study. Subjects were randomly distributed in one 8 week exercise intervention or in one control group. Exercise program consisted of resistance training and home-based walking. Before and after the training program, muscular strength, fasting blood glucose, hemoglobin A1C, (HbA1C) and plasma lipid values, quality of life and symptoms of depression of the patients were assessed.Results:Exercise group's baseline HbA1C was significantly higher than the control groups (p< 0.05); other blood parameters were similar between the two groups (p>0.05). At the baseline no significant differences were observed in the depression and four subscales (physical function, physical role, bodily pain, and general health perceptions) of the SF-36 between the exercise and control groups (p>0.05). The exercise group had higher scores of emotional role, vitality and mental health subscales than the control groups after the training programs (p<0.05).Conclusion:Exercise training which included resistance training and home- based walking could be safe, effective and beneficial in diabetic patients.
The pathogenesis of diabetic osteopenia is unclear. The markers of bone metabolism may show some changes in diabetic patients. In this study, we investigated the effect of glycemic control on serum osteocalcin level and urinary hydroxyproline excretion and the relations of these markers to duration of diabetes, C-peptide status, and body mass index. Twenty-seven men with poorly controlled diabetes mellitus (DM) (HbA1 > 9%, fasting plasma glucose > 7.8 mmol/liter) between ages 25 and 60 years (means +/- SD 46.6 +/- 10.4) were included in the study. Duration of diabetes was 5.8 +/- 4.7 years, body mass index (BMI) was 25 +/- 3.5 kg/m2, and fasting C-peptide was 2.33 (1.05-3.21) micrograms/liter. None of the patients had a disease or were treated with drugs that would interfere with calcium or phosphate metabolism and/or bone structure. They were free from chronic diabetic complications. Of these patients, 11 were lost to follow-up before metabolic control was achieved. The remaining 16 patients obtained good glycemic control (HbA1 < 8.3%, fasting plasma glucose < 7.8 mmol/liter) and completed the study. Serum osteocalcin level and urinary hydroxyproline excretion were determined before and after glycemic control. Urinary hydroxyproline excretion was not significantly changed by glycemic control [17.8 (7.1-23.2) versus 18.1 (10.9-28.1) mg/m2 day, P > 0.05]. However, serum osteocalcin level was significantly elevated (5.04 +/- 1.43 versus 4.17 +/- 1.83 micrograms/liter, P = 0.04). We found no correlation among fasting plasma glucose, HbA1, and fasting serum C-peptide levels with urinary hydroxyproline excretion. There was also no correlation between serum osteocalcin and fasting plasma glucose or serum C-peptide, but HbA1 was negatively correlated with serum osteocalcin (P = 0.01). No correlation was found between DM duration and BMI in the patients with serum osteocalcin level and urinary hydroxyproline excretion. To eliminate the possible effect of exogenous insulin on bone metabolism, the correlation analysis between the markers and C-peptide was further repeated in oral agents-treated patients. Serum C-peptide was not correlated to serum osteocalcin or urinary hydroxyproline in this subgroup of patients. Knowing that serum osteocalcin is a marker of bone formation, we concluded that osteoblast function may improve by glycemic control in diabetic patients; this may be due to correction of metabolic abnormalities associated with insulinopenia.
The frequency of insulin-dependent diabetes mellitus in the Turkish adult-onset diabetic population has not been assessed previously. In the present study, we retrospectively evaluated the medical records of 801 Turkish patients with adult-onset (> or = 30 years) diabetes to determine the frequency of cases diagnosed as insulin-dependent diabetes. Fifty-two (6.5%) patients met our criteria of adult-onset insulin-dependent diabetes mellitus. At disease onset, 20 patients presented with ketoacidosis (38.5%), while 32 patients (61.5%) were non-ketotic. In the insulin-dependent diabetic group, islet cell antibodies were positive in 10 out of 16 (62.5%) patients studied. In contrast, none of the 16 patients had positive reactions with respect to insulin autoantibodies. Twelve out of 20 patients (60%) had glucagon-stimulated C-peptide levels above 0.6 nmol/l, suggesting a sufficient insulin secretory reserve. In view of these observations, we conclude that insulin-dependent diabetes mellitus is not rare among patients with adult-onset diabetes in the Turkish population. In a majority of cases, the disease onset is non-ketotic. Beta-cell function is relatively preserved, and insulin autoantibodies do not develop at diagnosis. In contrast, islet cell antibodies are frequently present at the onset of clinical insulin-dependent diabetes, possibly indicating continuing beta-cell destruction.
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