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  • Title: Impact of Exercise-Nutritional State Interactions in Patients with Type 2 Diabetes.
    Author: Verboven K, Wens I, Vandenabeele F, Stevens AN, Celie B, Lapauw B, Dendale P, VAN Loon LJC, Calders P, Hansen D.
    Journal: Med Sci Sports Exerc; 2020 Mar; 52(3):720-728. PubMed ID: 31652237.
    Abstract:
    INTRODUCTION: This study examines the role of nutritional status during exercise training in patients with type 2 diabetes mellitus by investigating the effect of endurance-type exercise training in the fasted versus the fed state on clinical outcome measures, glycemic control, and skeletal muscle characteristics in male type 2 diabetes patients. METHODS: Twenty-five male patients (glycated hemoglobin (HbA1c), 57 ± 3 mmol·mol (7.4% ± 0.3%)) participated in a randomized 12-wk supervised endurance-type exercise intervention, with exercise being performed in an overnight-fasted state (n = 13) or after consuming breakfast (n = 12). Patients were evaluated for glycemic control, blood lipid profiles, body composition and physical fitness, and skeletal muscle gene expression. RESULTS: Exercise training was well tolerated without any incident of hypoglycemia. Exercise training significantly decreased whole-body fat mass (-1.6 kg) and increased high-density lipoprotein concentrations (+2 mg·dL), physical fitness (+1.7 mL·min·kg), and fat oxidation during exercise in both groups (PTIME < 0.05), with no between-group differences (PTIME × GROUP > 0.05). HbA1c concentrations significantly decreased after exercise training (PTIME < 0.001), with a significant greater reduction after consuming breakfast (-0.30% ± 0.06%) compared with fasted state (-0.08% ± 0.06%; mean difference, 0.21%; PTIME × GROUP = 0.016). No interaction effects were observed for skeletal muscle genes related to lipid metabolism or oxidative capacity. CONCLUSIONS: Endurance-type exercise training in the fasted or fed state do not differ in their efficacy to reduce fat mass, increase fat oxidation capacity, and increase cardiorespiratory fitness and high-density lipoprotein concentrations or their risk of hypoglycemia in male patients with type 2 diabetes. HbA1c seems to be improved more with exercise performed in the postprandial compared with the postabsorptive state.
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