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

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

  • Title: Interaction of dietary fatty acid composition and exercise on fat oxidation, energy expenditure, and markers of hunger and satiety.
  • Author: Jamie A. Cooper
  • ISBN: 9781109469738
  • Page: 197
  • Format: NOOK Study eTextbook
  • 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.

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