Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2024) 23, 767 - 777   DOI: https://doi.org/10.52082/jssm.2024.767

Research article
Effects of 5-Wk Repeated Sprint Training in Hypoxia on Global Inspiratory and Core Muscle Functions
Qingde Shi1, Jinlei Nie1, , Tomas K. Tong2, Haifeng Zhang3, Zhaowei Kong4
Author Information
1 Faculty of Health Sciences and Sports, Macao Polytechnic University, Macao S.A.R, China
2 Dr. Stephen Hui Research Centre for Physical Recreation and Wellness, Hong Kong Baptist University, Hong Kong S.A.R, China
3 Physical Education College, Hebei Normal University, Shijiazhuang, Hebei, China
4 Faculty of Education, University of Macau, Macao S.A.R, China

Jinlei Nie
✉ Faculty of Health Sciences and Sports, Macao Polytechnic University, Rua de Luis Gonzaga Gomes, Macao S.A.R, China
Email: jnie@mpu.edu.mo
Publish Date
Received: 09-06-2024
Accepted: 01-10-2024
Published (online): 01-12-2024
 
 
ABSTRACT

Repeated-sprint training in hypoxia (RSH) has been shown to boost team-sport players’ repeated-sprint ability (RSA). Whether players’ global inspiratory muscle (IM) and core muscle (CM) functions would be altered concomitantly with RSH was not reported. This study was designed to compare the concomitant alternations in players’ RSA and their IM and CM functions during a team-sport-specific intermittent exercise protocol (IEP) before and after the intervention. Twenty players were assigned into either RSH or control (CON) groups (n = 10 for each). RSH players participated in 5-wk RSH (15 sessions, 3 sets 5x5-s all-out treadmill sprints interspersed with 25-s passive recovery under the hypoxia of 13.5%) while CON players had no corresponding training. The changes in RSA between pre- and post-intervention, and the alterations in IM and CM functions that were revealed by maximum inspiratory mouth pressure (PImax) and sport-specific endurance plank test (SEPT) performance, respectively, between pre- and post-IEP and across pre- and post-intervention in the RSH group were compared with that of CON. Following the 5-wk RSH, players’ RSA improved significantly (>6%, p < 0.05) while PImax and SEPT performance did not alter (P > 0.05). Nevertheless, PImax which declined markedly in pre-intervention IEP (pre-IEP 155.4 ± 22.7 vs post-IEP 140.6 ± 22.8 cmH2O, p < 0.05) was alleviated significantly in post-intervention IEP (152.2 ± 27.4 vs 152.6 ± 31.8, p > 0.05), while the concomitant declined SEPT performance in the pre-intervention IEP (155 ± 24.6 vs 98.1 ± 21.7 s, p < 0.05) was retained post intervention (170.7 ± 38.1 vs 100.5 ± 33.4, p < 0.05). For the CON, all variables were unchanged (p > 0.05). Such findings suggest that 5-wk RSH could enhance players’ RSA but not global IM and CM functions. Nonetheless, the decline in PImax in pre-intervention IEP alleviated significantly post intervention led to a postulation that players’ IM endurance, rather than strength, might improve with the 5-wk RSH regimen, while the possible improved IM endurance did not advance the fatigue resistance of CM.

Key words: Intermittent hypoxic training, inspiratory muscle strength, respiratory muscle training, maximum inspiratory mouth pressure, sport-specific endurance plank test


           Key Points
  • 5-wk repeated-sprint training in hypoxia (RSH) enhanced team-sport players’ repeated sprint ability in a team-sport-specific intermittent exercise protocol (IEP), while their global inspiratory muscle strength did not alter.
  • Nevertheless, IEP-induced inspiratory muscle fatigue in players alleviated significantly following RSH.
  • However, the alleviation of global inspiratory muscle fatigue following RSH did not advance the fatigue resistance of core muscles during the IEP.
 
 
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