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Cited by 40High Altitude and HypoxiaSports Performance and TrainingCardiovascular and exercise physiology

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Acute Physiological and Performance Responses to High-Intensity Resistance Circuit Training in Hypoxic and Normoxic Conditions

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Ramos-Campo, Domingo J., Rubio-Arias, Jacobo Á., Freitas, Tomás T., Camacho, Arturo, Jiménez-Diaz, José F., Alcaraz, Pedro E.·2017·Journal of Strength and Conditioning Research
DOI 10.1519/jsc.0000000000001572
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Abstract

Ramos-Campo, DJ, Rubio-Arias, JÁ, Freitas, TT, Camacho, A, Jiménez-Diaz, JF, and Alcaraz, PE. Acute physiological and performance responses to high-intensity resistance circuit training in hypoxic and normoxic conditions. J Strength Cond Res 31(4): 1040-1047, 2017-The aim of this study was to analyze physical performance and physiological variables during high-intensity resistance circuit training (HRC) with the addition of 2 levels (moderate and high) of systemic hypoxia. Twelve resistance-trained young male subjects participated in the study. After a 6 repetition maximum testing session, participants performed 3 randomized trials of HRC: normoxia (NORM: fraction of inspired oxygen [FiO2] = 0.21; ∼0 m altitude), moderate hypoxia (MH: FiO2 = 0.16; ∼2.100 m altitude), or high hypoxia (HH: FiO2 = 0.13; ∼3.800 m altitude), as controlled by a hypoxic generator. Bench press force, heart rate and heart rate variability, rating of perceived exertion, resting metabolic rate, energy cost, and countermovement jump were assessed in each session. Heart rate variability in HH was significantly lower (standard deviation of all normal NN intervals [intervals between two "normal" beats] = 111.9 vs. 86.7 milliseconds; standard deviation of the difference between consecutive NN intervals = 19.5 vs. 17.0 milliseconds; p ≤ 0.05) in comparison with NORM. There were significant differences in rating of perceived exertion between NORM and HH (11.6 vs. 13.8 points). Peak and mean force on the bench press were significantly lower (p ≤ 0.05) in HH when compared with MH (peak: 725 vs. 488 N; mean: 574 vs. 373 N). Energy cost was significantly higher (p ≤ 0.01) in both hypoxic conditions compared with NORM (NORM: 10.4; MH: 11.7; HH: 13.3 kJ·min). There were no differences between conditions in heart rate and countermovement jump variables. These results indicate that hypoxic stimuli during HRC exercise alter physical performance and physiological variables and affect how strenuous the exercise is perceived to be. High-intensity resistance circuit training in hypoxia increases the stress on the performance and physiological responses, and these differences must be taken into account to avoid an excessive overload.

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  1. Marín-Pagán, 2014, Post-exercise responses to an acute bout of high resistance circuit training vs. traditional strength training, J Strength Cond Res, 28, 75

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Metadata

Authors
Ramos-Campo, D. J., Rubio-Arias, J. Á., Freitas, T. T., Camacho, A., Jiménez-Diaz, J. F., & Alcaraz, P. E.
Affiliations
  • Department of Physical Activity and Sport Science, Sport Science Faculty, Catholic University of Murcia, Murcia, Spain;
  • Universidad Católica de Murcia (ES)
  • Laboratory of Physical Performance and Readaptation Injuries, University of Castilla-La Mancha, Toledo, Spain
ORCID
Freitas, Tomás T.
Venue
Journal of Strength and Conditioning Research
Publisher
Ovid Technologies (Wolters Kluwer Health)
Published
2017-04
Volume
31
Issue
4
Pages
1040-1047
ISSN
1064-8011 (ISSN-L)
DOI
10.1519/jsc.0000000000001572
OpenAlex
W2477777230
Cited by
40
References
31
Citations by year
2026: 2 · 2025: 3 · 2024: 4 · 2023: 3 · 2022: 3 · 2021: 5 · 2020: 7 · 2019: 9 · 2018: 1 · 2017: 3
FWCI
3.50
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • The Journal of Strength and Conditioning Research (publishedVersion)
  • PubMed (publishedVersion)
  • RIUCAM (submittedVersion, other-oa)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-nd)
Topics
  • Health Sciences › Medicine › Physiology (medical) › High Altitude and Hypoxia
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
Keywords
hypoxia, altitude training, resistance training, heart rate variability, rating of perceived exertion, energy costs, countermovement jump, physical performance
MeSH terms
Adult, Hypoxia, Basal Metabolism, Energy Metabolism, Heart Rate, Humans, Male, Muscle Strength, Resistance Training, Young Adult, Circuit-Based Exercise

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