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Background. Diets high in fat (HF) and sedentary lifestyle are implicated in the development of obesity.;Objective. To examine the effects of a HF diet, rich in either mono-unsaturated or saturated FAs and exercise on 24h energy expenditure (24hEE), fuel utilization, and hunger and satiety.;Design. Eight healthy males (age 18-45y, BMI 22+/-3kg/m 2) were randomized in a 2x2Background. Diets high in fat (HF) and sedentary lifestyle are implicated in the development of obesity.;Objective. To examine the effects of a HF diet, rich in either mono-unsaturated or saturated FAs and exercise on 24h energy expenditure (24hEE), fuel utilization, and hunger and satiety.;Design. Eight healthy males (age 18-45y, BMI 22+/-3kg/m 2) were randomized in a 2x2 crossover design. Treatments were HF diets (50% of energy) with high saturated fat (22% of energy) and exercise (SE) or sedentary (SS) conditions, or high monounsaturated fat (30% of energy) with exercise (UE) or sedentary (US) conditions. Subjects spent 5 days in a metabolic chamber for each treatment and cycled at 45% of VO2max for 2h each day during exercise visits. Respiratory gases and urinary nitrogen were collected for 24hEE and fat oxidation. On day 4, blood was drawn hourly between 0800 and 2200 and every two hours between 2400 and 0800 on day 5 for markers of hunger and satiety (insulin, leptin, peptide YY (PYY), and ghrelin).;Results. Average 24hEE showed no differences with respect to dietary FA composition (3202+/-146, 3208+/-151, 2240+/-82, and 2270+/-104kcal/d for SE, UE, SS, and US, respectively). From day 1 to 5, both exercise treatments increased fat oxidation (SE = 76+/-3 0g, p=0.001 and UE = 118+/-31g, plt;0.001), while neither sedentary condition changed fat oxidation although there was a trend with the US condition (SS = -10+/-33g, ns and US = 41+/-14g, p=0.07). No differences for dietary FA composition were found. Lastly, 24h leptin and insulin levels were lower for both exercise vs. sedentary visits. Conversely, 24h PYY was higher during exercise vs. sedentary conditions while no treatment differences were seen for ghrelin. FA composition did not differentially affect 24h hormone values.;Conclusion. Short-term exposure to a HF diet rich in mono-unsaturated FAs did not differ from a diet rich in saturated FAs with respect to 24hEE, fat oxidation, or hunger and satiety hormones in healthy, non-obese males. Exercise led to a faster adaptation to a HF diet by increasing global fat oxidation and achieving fat balance by day 5....

Title : Interaction of dietary fatty acid composition and exercise on fat oxidation, energy expenditure, and markers of hunger and satiety.
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ISBN : 9781109469738
Format Type : NOOK Study eTextbook
Number of Pages : 196 Pages
Status : Available For Download
Last checked : 21 Minutes ago!

Interaction of dietary fatty acid composition and exercise on fat oxidation, energy expenditure, and markers of hunger and satiety. Reviews