Effect of dietary fat intake on total body and white blood cell fat oxidation in exercised sedentary subjects

• Published in: Nutrition research (New York, N.Y.) Vol. 25; no. 3; pp. 225 - 237
• Main Authors: Meksawan, Kulwara, Pendergast, David R., Vladutiu, Georgirene D., Awad, Atif B.
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01.03.2005; Elsevier Science
• Subjects: Biological and medical sciences; Energy balance; Feeding. Feeding behavior; Fundamental and applied biological sciences. Psychology; Genetics; High-fat diet; Oxygen consumption; Respiratory exchange ratio; Vertebrates: anatomy and physiology, studies on body, several organs or systems; Respiratory exchange ratio; Energy balance; Oxygen consumption; Genetics; High-fat diet; Treadmill exercise; Physical exercise; Human; Cell oxidation; Feeding behavior; Leukocyte; Red blood cell; Lipids; Feeding; Blood cell; Diet; Food intake; Sedentary
• ISSN: 0271-5317; 1879-0739
• DOI: 10.1016/j.nutres.2004.10.011

The effect of fat intake on total body (TB) and white blood cell (WBC) fat oxidation (FO) was studied during exercise in sedentary subjects. Four men and 6 women consumed diets of 19% and 50% energy from fat for 3 weeks each compared with their regular diet (30%). Before and after each diet, TB FO was measured at each stage of a treadmill test and WBC FO was determined. Fat intake had no effect on TB and WBC FO. Total body FO decreased as exercise intensity increased. WBC FO decreased postexercise as a result of an increase in WBC count. Total body FO in sedentary subjects was not influenced by diet at rest or during exercise. There was no effect from diet but exercise had a small effect on WBC FO. WBC FO may indicate a genetic predisposition for FO.