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Cardiorespiratory responses of load carriage in female and male soldiers
Halmstad University, School of Business, Innovation and Sustainability. Department of Medical Imaging and Physiology, Skåne University Hospital, Department of Translational Medicine, Lund University, Sweden; Swedish Armed Forces, Eksjö, Sweden.ORCID iD: 0000-0003-0613-4096
Department of Medical Imaging and Physiology, Skåne University Hospital, Department of Translational Medicine, Lund University, Sweden.ORCID iD: 0000-0001-9991-3712
Halmstad University, School of Business, Innovation and Sustainability. Department of Clinical Sciences, Lund, Section of Rheumatology, Lund University, Sweden; Department of Regional Health Research, University of Southern Denmark, Odense, Denmark.ORCID iD: 0000-0002-8081-579X
Halmstad University, School of Business, Innovation and Sustainability.ORCID iD: 0000-0002-9337-5113
2022 (English)In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 101, article id 103710Article in journal (Refereed) Published
Abstract [en]

Purpose

To investigate the effect of sex and load carriage on cardiorespiratory responses to high intensity exercise in male and female soldiers.

Methods

Soldiers (9 women, 9 men) performed a graded treadmill test until exhaustion with no load (NL) and combat-gear with body armor (CG). Cohen's d effect sizes, paired t-tests and ANOVA were used to study differences between conditions. A mixed linear regression model analyzed the relationship between heart rate (HR) and oxygen uptake (V̇O2) with load and between sexes.

Results

Wearing CG resulted in, for both sexes, a decreased time to exhaustion (−11 min), lower V̇O2peak (L/min) ES = 0.56; VO2peak (mL//kg/min) ES = 2.44, both p < 0.001, a net decrease in minute ventilation (ES = 3.53) and no change in HRmax. No sex-difference were present except for absolute V̇O2peak. The VO2 and HR relationship showed a cardiorespiratory reduction wearing CG vs. NL. Added load was equal between sexes, although female soldiers' CG relative to body mass was higher (25%) than male soldiers’ (20%), p < 0.01.

Conclusion

Wearing CG reduces soldiers’ cardiorespiratory capacity and exercise performance level, although the reduction cannot be explained solely based on the added load of CG, instead CG seems to restrict the capacity to fully ventilate. No sex differences were found in relative cardiorespiratory responses to wearing CG compared to NL.

Place, publisher, year, edition, pages
Oxford: Elsevier, 2022. Vol. 101, article id 103710
Keywords [en]
Aerobic capacity, Ventilation, VO2peak, Graded exercise test
National Category
Medical and Health Sciences Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:hh:diva-46417DOI: 10.1016/j.apergo.2022.103710ISI: 000799850300012PubMedID: 35217405Scopus ID: 2-s2.0-85124976436OAI: oai:DiVA.org:hh-46417DiVA, id: diva2:1640808
Funder
Swedish Armed Forces
Note

Funding: Halmstad University and Swedish Armed Forces

Available from: 2022-02-27 Created: 2022-02-27 Last updated: 2023-08-21Bibliographically approved

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Larsson, JonasBremander, AnnOlsson, M. Charlotte

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