A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Endurance Capacity Impairment in Cold Air Ranging from Skin Cooling to Mild Hypothermia (2024)


Wallace, P. J., Hartley, G. L., Nowlan, J. G., Ljubanovich, J., Sieh, N., Taber, M. J., Gagnon, D. D., & Cheung, S. S. (2024). Endurance Capacity Impairment in Cold Air Ranging from Skin Cooling to Mild Hypothermia. Journal of Applied Physiology, 136(1), 58-69. https://doi.org/10.1152/japplphysiol.00663.2023


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajatWallace, Phillip J.; Hartley, Geoffrey L.; Nowlan, Josh G.; Ljubanovich, Johnathan; Sieh, Nina; Taber, Michael J.; Gagnon, Dominique D.; Cheung, Stephen S.

Lehti tai sarjaJournal of Applied Physiology

ISSN8750-7587

eISSN1522-1601

Julkaisuvuosi2024

Ilmestymispäivä09.11.2023

Volyymi136

Lehden numero1

Artikkelin sivunumerot58-69

KustantajaAmerican Physiological Society

JulkaisumaaYhdysvallat (USA)

Julkaisun kielienglanti

DOIhttps://doi.org/10.1152/japplphysiol.00663.2023

Julkaisun avoin saatavuusEi avoin

Julkaisukanavan avoin saatavuus

Julkaisu on rinnakkaistallennettu (JYX)https://jyx.jyu.fi/handle/123456789/92145


Tiivistelmä

Introduction: We tested the effects of cold air (0°C) exposure on endurance capacity to different levels of cold strain ranging from skin cooling to core cooling of ∆-1.0°C.
Methods: Ten males completed cycling time-to-exhaustion (TTE) at 70% of their peak power output following: i) 30-min of exposure to 22°C thermoneutral air (TN), ii) 30-min exposure to 0°C air leading to a cold shell (CS), iii) 0°C air exposure causing mild hypothermia of -0.5°C from baseline rectal temperature (HYPO-0.5°C), and iv) 0°C air exposure causing mild hypothermia of -1.0°C from baseline rectal temperature (HYPO-1.0°C). The latter three conditions tested TTE in 0°C air.
Results: Core temperature and seven-site mean skin temperature at the start of the TTE were: TN (37.0 ± 0.2°C, 31.2 ± 0.8°C), CS (37.1 ± 0.3°C, 25.5 ± 1.4°C), HYPO-0.5°C (36.6 ± 0.4°C, 22.3 ± 2.2°C), HYPO-1.0°C (36.4 ± 0.5°C, 21.4 ± 2.7°C). There was a significant condition effect (p≤0.001) for TTE, where TTE declined from TN (23.75 ± 13.75 min) to CS (16.22 ± 10.30 min, ∆-30.9 ± 21.5%, p=0.055), HYPO-0.5°C (8.50 ± 5.23 min, ∆-61.4 ± 19.7, p≤0.001), and HYPO-1.0°C (6.50 ± 5.60 min, ∆-71.6 ± 16.4%, p≤0.001). Furthermore, participants had a greater endurance capacity in CS compared to HYPO-0.5°C (p=0.046), and HYPO-1.0°C (p=0.007), with no differences between HYPO-0.5°C and HYPO-1.0°C (p=1.00).
Conclusion: Endurance capacity impairment at 70% peak power output occurs early in cold exposure with skin cooling and inadequate clothing, with significantly larger impairments with mild hypothermia up to ∆-1.0°C.


YSO-asiasanatkylmyyskestävyyssuorituskykyhypotermiaruumiinlämpölämpötilaaltistuminenihovaatteet

Vapaat asiasanatcore cooling; mild hypothermia; endurance capacity; cold strain; heat debt


Liittyvät organisaatiot


OKM-raportointiKyllä

VIRTA-lähetysvuosi2023

Alustava JUFO-taso2


Viimeisin päivitys 2024-02-07 klo 23:26