Effects of Exercise Training on Fat Oxidation in Untrained Overweight and Obese Females

摘要: EFFECTS OF EXERCISE TRAINING ON FAT OXIDATION IN UNTRAINED OVERWEIGHT AND OBESE FEMALES by Kelly P. Manning This study examined whether a high-intensity interval (IT) or continuous steady-state (CT) exercise training program had the greatest effect on fat oxidation rates and mass loss in population of untrained overweight obese females. Thirteen female subjects (VO2peak 30.6 ± 1.29 ml . kg min -1 , BMI 29 0.79, [FM] 33.3 2.09 kg) were randomly assigned to either CT (exercise at relative intensity that elicits maximal rate [FATmax] ) an IT (intervals alternating 5 minutes 40% 85% VO2peak) group exercised approximately 1 hour, 3 days week for 10 weeks. Body composition assessments, peak oxygen uptake (VO2peak), FATmax plasma free fatty acid (FFA) concentrations preand posttraining using dual-energy X-ray absorptiometry (DXA), ParvoMedics gas analysis system FFA half micro tests (Roche Diagnostics). No significant differences found post-training body weight (kg), (%), fat-free mass, (P>0.05). The elicited was significantly increased from 35.3 2.55% 44.7 3.56% (P <0.05). determined higher after weeks compared with program, which resulted longer durations during submaximal bouts. These data suggest induces greater increase this population. Although not altered, it is possible through induced metabolic adaptations intramuscular triacylglyceride (IMTG) contributions given work could be post-training.