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High-intensity interval training in normobaric hypoxia improves cardiorespiratory fitness in overweight Chinese young women
Kong,Zhaowei1; Shi,Qingde2; Nie,Jinlei2; Tong,Tomas K.3; Song,Lili1; Yi,Longyan4; Hu,Yang4
2017-03-23
Source PublicationFrontiers in Physiology
ISSN1664042X
Volume8Issue:MAR
AbstractPrevious studies have investigated the effects of high-intensity interval training (HIIT) on cardiorespiratory fitness and body composition in overweight populations. However, the additive effect of HIIT and hypoxia on health parameters is not clear. This study compared the effects of HIIT under hypoxic conditions on cardiometabolic function with that under normoxia in overweight Chinese young women. Methods: A double-blind randomized controlled experimental design was applied. Twenty-four sedentary overweight Chinese young women (weight: 68.8 ± 7.0 kg, BMI: 25.8 ± 2.3 kg·m) participated in the HIIT under either normoxia (NORM, n = 13, PIO: 150 mmHg, FIO: 0.21) or normobaric hypoxia (HYP, n = 11, PIO: 117 mmHg, FIO: 0.15) for 5 weeks. HIIT was composed of 60 repetitions of 8 s maximal cycling effort interspersed with 12-s recovery per day, for 4 days per week. Cardiorespiratory fitness [peak oxygen uptake (V·O), and peak oxygen pulse (peak O pulse)], serum lipid profile [triglycerides (TG), total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C)], and body composition (regional and whole-body), were assessed at pre- and post-intervention during the days beyond the self-reported menstrual phase of the participants. Habitual physical activity and diary behavior were maintained during the intervention period. Results: With similar daily energy intake and physical activity, the increases in V·O [NORM: 0.26 ± 0.37 L·min (+11.8%) vs. HYP: 0.54 ± 0.34 L·min (+26.1%)] and peak O pulse (NORM: +13.4% vs. HYP: +25.9%) for HYP were twice-larger than for NORM (p < 0.05). Although the 5-wk HIIT led to significant improvements in the ratios of TC/HDL-C (p = 0.035) and TG/HDL-C (p = 0.027), no significant group effects were found on the serum variables. Further, no significant changes in body composition or serum fasting leptin were observed in either group. Conclusion: 5-wk of HIIT improved cardiorespiratory fitness and blood lipids in overweight Chinese young females, while the additive effect of the HIIT under normobaric hypoxia solely enhanced cardiorespiratory fitness, but not body composition or serum lipid profile.
KeywordBlood lipids Body composition High-intensity interval training Leptin Maximal oxygen uptake Normobaric hypoxia
DOI10.3389/fphys.2017.00175
URLView the original
Language英语
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Cited Times [WOS]:9   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorHu,Yang
Affiliation1.Faculty of Education,University of Macau,,Macau,Macao
2.School of Physical Education and Sports,Macao Polytechnic Institute,,Macau,Macao
3.Department of Physical Education,Dr. Stephen Hui Research Centre for Physical Recreation and Wellness,Hong Kong Baptist University,,Hong Kong
4.Sports Science Research Center,Beijing Sport University,,Beijing,China
First Author AffilicationFaculty of Education
Recommended Citation
GB/T 7714
Kong,Zhaowei,Shi,Qingde,Nie,Jinlei,et al. High-intensity interval training in normobaric hypoxia improves cardiorespiratory fitness in overweight Chinese young women[J]. Frontiers in Physiology,2017,8(MAR).
APA Kong,Zhaowei.,Shi,Qingde.,Nie,Jinlei.,Tong,Tomas K..,Song,Lili.,...&Hu,Yang.(2017).High-intensity interval training in normobaric hypoxia improves cardiorespiratory fitness in overweight Chinese young women.Frontiers in Physiology,8(MAR).
MLA Kong,Zhaowei,et al."High-intensity interval training in normobaric hypoxia improves cardiorespiratory fitness in overweight Chinese young women".Frontiers in Physiology 8.MAR(2017).
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