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00005768-200705001-0267100005768_2007_39_s467_shriver_utilization_5miscellaneous< 14_0_1_0 >Medicine & Science in Sports & Exercise© 2007 American College of Sports MedicineVolume 39(5) SupplementMay 2007p S467The Effects of Anaerobic Resistance Exercise on the Utilization of Dietary Fat: 2490: Board #37 June 2 8:00 AM ‐ 9:30 AM[G-14 Free Communication/Poster - Exercise Immunology III: JUNE 2, 2007 7:30 AM - 11:00 AM ROOM: Hall E]Shriver, Timothy C.; Adams, Alexandra K.; Clark, R. Randall; Schoeller, Dale A.University of Wisconsin, Madison, WI.Email: tshriver@nutrisci.wisc.edu We have previously used 13C-oleate and 2H-palmitate labeled fats to measure postprandial fat oxidation in humans following bouts of isocaloric aerobic exercise of varying intensities. We found that both moderate and intense bouts increased monounsaturated, but not saturated fat oxidation.PURPOSE: To examine the effect of a pre-prandial bout of high intensity anaerobic resistance exercise on the oxidation of exogenous monounsaturated fat and a saturated fat in humans. Method: Eight female and four male college age (20.7+3.4 yr) subjects were first assessed for aerobic and anaerobic fitness and resting metabolic rate. The subjects then participated in three 36-hour stays in a human indirect metabolic calorimeter at the UW Hospital's GCRC. Total energy expenditure for each treatment was calculated from O2 consumption, while macronutrient oxidation was calculated from analysis of urinary N2 and calorimeter RER. Treatments during the stays were randomly assigned as either resistance training, cycle ergometry, or rest. Subjects performed a bout of exercise equivalent to 150 Kcal above their RMR. A liquid meal supplement containing the labeled fats 13C-oleate and d31-palmitate was consumed one and a half hours after the completion of the exercise. Urine samples were collected for the analysis of the d31-palmitate, while breath samples were collected for the analysis of the 13C-oleate.RESULTS: Total energy expenditure for 22.5 hours treatment day was (1850 + 49 Kcal, mean + SEM), (2031 +58 Kcal), (2029 + 49 Kcal) for rest, bike, and resistance exercise respectively. Cumulative oxidation of 13C-oleate at 12.5 hrs post dose was significantly higher in both the anaerobic (71% + 3%) and aerobic (65% + 4%) exercise bouts compared to rest (56% + 2%) (P<0.0001). The cumulative oxidation of d31 -palmitate at 12.5 hr post dose was not significantly different for either of the exercise treatments or rest. Global fat oxidation from RER for the 12.5 post dose period was (605 + 51 Kcal), (755 + 76 Kcal), (768 + 40 Kcal) for rest, bike, and resistance exercise respectively.CONCLUSION: These data show that the oxidative partitioning of a dietary unsaturated fat, which occurs after an aerobic bout of exercise, can also be attained from an anaerobic bout of exercise of equal caloric expenditure.The Effects of Anaerobic Resistance Exercise on the Utilization of Dietary Fat: 2490: Board #37 June 2 8:00 AM ‐ 9:30 AMShriver, Timothy C.; Adams, Alexandra K.; Clark, R. Randall; Schoeller, Dale A.G-14 Free Communication/Poster - Exercise Immunology III: JUNE 2, 2007 7:30 AM - 11:00 AM ROOM: Hall E539