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High-intensity exercise and carbohydrate-reduced energy-restricted diet in obese individuals
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High-intensity exercise and carbohydrate-reduced energy-restricted diet in obese individuals
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Journal Article
High-intensity exercise and carbohydrate-reduced energy-restricted diet in obese individuals
2010
Overview
Continuous high glycemic load and inactivity challenge glucose homeostasis and fat oxidation. Hyperglycemia and high intramuscular glucose levels mediate insulin resistance, a precursor state of type 2 diabetes. The aim was to investigate whether a carbohydrate (CHO)-reduced diet combined with high-intensity interval training (HIIT) enhances the beneficial effects of the diet alone on insulin sensitivity and fat oxidation in obese individuals. Nineteen obese subjects underwent 14 days of CHO-reduced and energy-restricted diet. Ten of them combined the diet with HIIT (4 min bouts at 90% VO
2peak
up to 10 times, 3 times a week). Oral glucose insulin sensitivity (OGIS) increased significantly in both groups; [diet–exercise (DE) group: pre 377 ± 70, post 396 ± 68 mL min
−1
m
−2
; diet (D) group: pre 365 ± 91, post 404 ± 87 mL min
−1
m
−2
;
P
< 0.001]. Fasting respiratory exchange ratio (RER) decreased significantly in both groups (DE group: pre 0.91 ± 0.06, post 0.88 ± 0.06; D group: pre 0.92 ± 0.07, post 0.86 ± 0.07;
P
= 0.002). VO
2peak
increased significantly in the DE group (pre 27 ± 5, post 32 ± 6 mL kg
−1
min
−1
;
P
< 0.001), but not in the D group (pre 26 ± 9, post 26 ± 8 mL kg
−1
min
−1
). Lean mass and resistin were preserved only in the DE group (
P
< 0.05). Fourteen days of CHO-reduced diet improved OGIS and fat oxidation (RER) in obese subjects. The energy-balanced HIIT did not further enhance these parameters, but increased aerobic capacity (VO
2peak
) and preserved lean mass and resistin.
Publisher
Springer-Verlag,Springer,Springer Nature B.V
Subject
/ Biological and medical sciences
/ Biomedical and Life Sciences
/ Diabetes
/ Diet
/ Diet, Carbohydrate-Restricted
/ Energy
/ Exercise
/ Fundamental and applied biological sciences. Psychology
/ Glucose
/ Humans
/ Insulin Resistance - physiology
/ Male
/ Obesity
/ Occupational Medicine/Industrial Medicine
/ Oxygen Consumption - physiology
/ Tumor Necrosis Factor-alpha - blood
/ Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports
