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Hypoxic repeated sprint interval training improves cardiorespiratory fitness in sedentary young women
Kong,Zhaowei1; Lei,On Kei1; Sun,Shengyan2; Li,Lei3; Shi,Qingde4; Zhang,Haifeng5; Nie,Jinlei4
2022-04-01
Source PublicationJournal of Exercise Science and Fitness
ISSN1728-869X
Volume20Issue:2Pages:100-107
Abstract

Objective: The purpose of this study was to investigate the effects of repeated sprint interval training (RSIT) under different hypoxic conditions in comparison with normoxic RSIT on cardiorespiratory fitness (CRF) and metabolic health in sedentary young women. Methods: Sixty-two sedentary young women (age: 21.9 ± 2.8 years, peak oxygen uptake [V̇O] 25.9 ± 4.5 ml kg·min) were randomized into one of the four groups, including a normoxic RSIT group (N), RSIT simulating an altitude of 2500 m (H), RSIT simulating an incremental altitude of 2500–3400 m (H) and a non-exercise control group (C). The training intervention (80 × 6 s all-out cycling sprints with 9 s recovery) was performed three times/week for 4 weeks. Anthropometric measures, V̇O, fasting blood glucose and lipids were assessed during the follicular phase of the menstrual cycle before and after the intervention. Results: Compared with the control group, significant increases in V̇O were found in both hypoxic groups (H: +8.2%, p < 0.001, d = 0.52; H: +10.9%, p < 0.05, d = 0.99) but not in the N group (+3.6%, p > 0.05, d = 0.21) after the intervention, whereas the two hypoxic groups had no difference in V̇O. Blood glucose and lipids, and body composition remained unchanged in all groups. Conclusion: The present study indicates that combining hypoxia with RSIT can enhance the improvement of CRF compared with normoxic RSIT alone in the sedentary young population. Yet, compared with RSIT under stable hypoxia, incremental hypoxia stress in the short-term does not additionally ameliorate CRF.

KeywordAerobic Capacity High-intensity Interval Training Hypoxia Metabolic Health
DOI10.1016/j.jesf.2022.01.005
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaSport Sciences
WOS SubjectSport Sciences
WOS IDWOS:000819919400004
Scopus ID2-s2.0-85123890527
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Education
Corresponding AuthorNie,Jinlei
Affiliation1.Faculty of Education, University of Macau, Macao, China
2.Institute of Physical Education, Huzhou University, Huzhou, China
3.School of Physical Education, Ludong University, China
4.School of Health Sciences and Sports, Macao Polytechnic Institute, Macao, China
5.College of Physical Education, Hebei Normal University, Shijiazhuang, China
First Author AffilicationFaculty of Education
Recommended Citation
GB/T 7714
Kong,Zhaowei,Lei,On Kei,Sun,Shengyan,et al. Hypoxic repeated sprint interval training improves cardiorespiratory fitness in sedentary young women[J]. Journal of Exercise Science and Fitness,2022,20(2):100-107.
APA Kong,Zhaowei,Lei,On Kei,Sun,Shengyan,Li,Lei,Shi,Qingde,Zhang,Haifeng,&Nie,Jinlei.(2022).Hypoxic repeated sprint interval training improves cardiorespiratory fitness in sedentary young women.Journal of Exercise Science and Fitness,20(2),100-107.
MLA Kong,Zhaowei,et al."Hypoxic repeated sprint interval training improves cardiorespiratory fitness in sedentary young women".Journal of Exercise Science and Fitness 20.2(2022):100-107.
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