title: Effects of high-intensity interval training on cardiometabolic risk factors in overweight/obese women.
abstract: The purpose of this study was to evaluate two practical interval training protocols on cardiorespiratory fitness, lipids and body composition in overweight/obese women. Thirty women (mean ± SD; weight: 88.1 ± 15.9 kg; BMI: 32.0 ± 6.0 kg · m(2)) were randomly assigned to ten 1-min high-intensity intervals (90%VO2 peak, 1 min recovery) or five 2-min high-intensity intervals (80-100% VO2 peak, 1 min recovery) or control. Peak oxygen uptake (VO2 peak), peak power output (PPO), body composition and fasting blood lipids were evaluated before and after 3 weeks of training, completed 3 days per week. Results from ANCOVA analyses demonstrated no significant training group differences for any primary variables (P > 0.05). When training groups were collapsed, 1MIN and 2MIN resulted in a significant increase in PPO (∆18.9 ± 8.5 watts; P = 0.014) and time to exhaustion (∆55.1 ± 16.4 s; P = 0.001); non-significant increase in VO2 peak (∆2.36 ± 1.34 ml · kg(-)(1) · min(-)(1); P = 0.185); and a significant decrease in fat mass (FM) (-∆1.96 ± 0.99 kg; P = 0.011). Short-term interval exercise training may be effective for decreasing FM and improving exercise tolerance in overweight and obese women.
authors.affiliation: a Applied Physiology Laboratory, Department of Exercise and Sport Science , University of North Carolina , Chapel Hill , NC , USA.|b Human Movement Science, Allied Health Science , University of North Carolina , Chapel Hill , NC , USA.
authors.forename: Abbie E
authors.initials: AE
authors.lastname: Smith-Ryan
authors.affiliation: a Applied Physiology Laboratory, Department of Exercise and Sport Science , University of North Carolina , Chapel Hill , NC , USA.|b Human Movement Science, Allied Health Science , University of North Carolina , Chapel Hill , NC , USA.
authors.forename: Eric T
authors.initials: ET
authors.lastname: Trexler
authors.affiliation: a Applied Physiology Laboratory, Department of Exercise and Sport Science , University of North Carolina , Chapel Hill , NC , USA.
authors.forename: Hailee L
authors.initials: HL
authors.lastname: Wingfield
authors.affiliation: a Applied Physiology Laboratory, Department of Exercise and Sport Science , University of North Carolina , Chapel Hill , NC , USA.
authors.forename: Malia N M
authors.initials: MN
authors.lastname: Blue
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism*; D000328:Adult; D000704:Analysis of Variance; D001823:Body Composition; D000072599:Cardiorespiratory Fitness; D002318:Cardiovascular Diseases / Q000209:etiology / Q000517:prevention & control; D017079:Exercise Tolerance; D005215:Fasting; D005260:Female; D000072696:High-Intensity Interval Training; D006801:Humans; D007333:Insulin Resistance; D008055:Lipids / Q000097:blood; D008875:Middle Aged; D053580:Muscle Strength; D009765:Obesity / Q000378:metabolism / Q000503:physiopathology; D010101:Oxygen Consumption; D010807:Physical Endurance / Q000502:physiology; D005082:Physical Exertion / Q000502:physiology*; D012146:Rest / Q000502:physiology; D012307:Risk Factors; D055815:Young Adult
chemical_list: D008055:Lipids
keywords: Percent body fat; intermittent exercise; peak oxygen consumption; visceral fat