Effects of high-intensity interval training on cardiometabolic risk factors in overweight/obese women. Issue 21 (1st November 2016)

• Record Type: Journal Article
• Authors: Smith-Ryan, Abbie E.; Trexler, Eric T.; Wingfield, Hailee L.; Blue, Malia N.M.
• Is Part Of: Journal of sports sciences. Volume 34:Issue 21(2016)
• Page Start: 2038
• Page End: 2046
• Publication Date: 2016-11-01
• Subjects: Percent body fat -- peak oxygen consumption -- visceral fat -- intermittent exercise; Sports -- Periodicals; Sports -- Physiological aspects -- Periodicals; Sports -- Psychological aspects -- Periodicals; 612.044
• DOI: 10.1080/02640414.2016.1149609
• Languages: English
• ISSNs: 0264-0414

Abstract

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.