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. 2018 Aug;118(8):1589-1597.
doi: 10.1007/s00421-018-3890-3. Epub 2018 May 24.

Koroška 8000 Himalayan expedition: digit responses to cold stress following ascent to Broadpeak (Pakistan, 8051 m)

Jurij Gorjanc  1 , Shawnda A Morrison  2 , Adam C McDonnell  3 , Igor B Mekjavic  3   4
Affiliations

Koroška 8000 Himalayan expedition: digit responses to cold stress following ascent to Broadpeak (Pakistan, 8051 m)

Jurij Gorjanc et al. Eur J Appl Physiol. 2018 Aug.

Abstract

Purpose: Cold-induced vasodilatation (CIVD) is a peripheral blood flow response, observed in both the hands and feet. Exercise has been shown to enhance the response, specifically by increasing mean skin temperatures (Tsk), in part due to the increased number of CIVD waves. In contrast, hypobaric hypoxia has been suggested to impair digit skin temperature responses, particularly during subsequent hand rewarming following the cold stimulus. This study examined the combined effect of exercise and hypobaric hypoxia on the CIVD response. We compared the CIVD responses in the digits of both the hands and feet of a team of alpinists (N = 5) before and after a 35-day Himalayan expedition to Broadpeak, Pakistan (8051 m).

Methods: Five elite alpinists participated in hand and foot cold water immersion tests 20 days before and immediately upon return from their expedition.

Results: The alpinists summited successfully without supplemental oxygen. Post-expedition, all alpinists demonstrated higher minimum Tsk in their hands (pre: 9.9 ± 1.1, post: 10.1 ± 0.7 °C, p = 0.031). Four alpinists had either greater CIVD waves, and, consequently, higher mean Tsk in their hands, or higher recovery temperatures (pre: 26.0 ± 5.5 °C post: 31.0 ± 4.1 °C, p = 0.052), or faster rewarming rate (pre: 2.6 ± 0.5 °C min-1 post: 3.1 ± 0.4 °C min-1,p = 0.052). In the feet, the responses varied: 1/5 had higher wave amplitudes and 1/5 had higher passive recovery temperatures, whereas 3/5 had lower mean toe temperatures during cold exposure.

Conclusions: The results of the cold stress test suggest after a 35-day Himalayan expedition, alpinists experienced a slight cold adaptation of the hands, but not the feet.

Keywords: Cold-induced vasodilatation; Exercise; High-altitude medicine.

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References

    1. Amon M, Keramidas ME, Kounalakis SN, Mekjavic IB (2012) The effect of a sleep high-train low regimen on the finger cold-induced vasodilation response. High Alt Med Biol 13:32–39 - DOI
    1. Brändström H, Grip H, Hallberg P, Grönlund C, Angquist KA, Giesbrecht GG (1960) Hand cold recovery responses before and after 15 months of military training in a cold climate. Aviat Space Environ Med 79:904–908 - DOI
    1. Brown GM, Page J (1952) The effect of chronic exposure to cold on temperature and blood flow of the hand. J Appl Physiol 5:221–227 - DOI
    1. Chen F (1997) Thermal responses of the hand to convective and contact cold—with and without gloves. Dissertation. National Institute of Working Life, Solna
    1. Cheung SS, Daanen HA (2012) Dynamic adaptation of the peripheral circulation to cold exposure. Microcirculation 19:65–77 - DOI