Associations of Low-Intensity Resistance Training with Body Composition and Lipid Profile in Obese Patients with Type 2 Diabetes

Resistance training to increase muscle mass and functional capacity is an integral part of diet and exercise programs for the management of obesity and type 2 diabetes. Low-intensity resistance training with slow movement and tonic force generation (LST) may be a practical and safe regimen for elderly obese individuals but the health benefits are uncertain. This study investigated the effects of LST on body composition and metabolic parameters in obese patients with type 2 diabetes. Twenty-six obese patients with type 2 diabetes engaged in LST training during hospitalization and were advised to maintain this regimen for 12 weeks after discharge. We compared lipid profile, arterial stiffness, and body composition before and after LST training. After 12 weeks of LST training, the ratio of lower extremity muscle mass to body weight increased significantly (0.176 +/- 0.028 to 0.184 +/- 0.023, mean +/- SD), while body fat mass and body fat percentage decreased significantly (36.2 +/- 10.9 kg to 34.3 +/- 9.4 kg and 41.2 +/- 8.6% to 40.1 +/- 7.7%, respectively). Moreover, high-density lipoprotein cholesterol was significantly increased (42.2 +/- 14 mg/dl to 46.3 +/- 12.4 mg/dl) and both free fatty acids and lipoprotein(a) were decreased (665.2 +/- 212.1 mu Eq/l to 525.4 +/- 231.3 mu Eq/l and 15.4 +/- 18 mg/dl to 13.8 +/- 18 mg/dl, respectively). No significant change was observed in arterial stiffness. Although this study was a non-controlled investigation and some confounding factors including dietary intake, medication and compliance with training might affect the study result, a brief (12-week) LST training program may be a safe and effective strategy for the management of obesity and type 2 diabetes.