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Body Composition Changes During a 24-h Winter Mountain Running Race Under Extremely Cold Conditions


Chlíbková, Daniela; Žákovská, Alena; Rosemann, Thomas; Knechtle, Beat; Bednář, Josef (2019). Body Composition Changes During a 24-h Winter Mountain Running Race Under Extremely Cold Conditions. Frontiers in Physiology, 10:585.

Abstract

To date, no study has focused on body composition characteristics and on parameters associated with skeletal muscle damage and renal function in runners participating in a 24-h winter race held under extremely cold environmental conditions (average temperature of -14.3°C). Anthropometric characteristics, plasma urea (PU), plasma creatinine (Pcr), creatine kinase (CK), plasma volume (PV) and total body water (TBW) were assessed pre- and post-race in 20 finishers (14 men and 6 women). In male runners, body mass (BM) ( = 0.003) and body fat (BF) ( = 0.001) decreased [-1.1 kg (-1.4%) and -1.1 kg (-13.4%), respectively]; skeletal muscle mass (SM) and TBW remained stable ( > 0.05). In female runners, BF decreased ( = 0.036) [-1.3 kg (-7.8%)] while BM, SM and TBW remained stable ( > 0.05). The change (Δ) in BM was not related to Δ BF; however, Δ BM was related to Δ SM [ = 0.58, = 0.007] and Δ TBW ( = 0.59, = 0.007). Δ SM correlated with Δ TBW ( = 0.51, = 0.021). Moreover, Δ BF was negatively associated with Δ SM ( = -0.65, = 0.002). PV ( < 0.001), CK ( < 0.001), Pcr ( = 0.004) and PU ( < 0.001) increased and creatinine clearance (CrCl) decreased ( = 0.002). The decrease in BM was negatively related to the increase in CK ( = -0.71, < 0.001). Δ Pcr was positively related to Δ PU ( = 0.64, = 0.002). The decrease in CrCl was negatively associated with the increase in both PU ( = -0.72, < 0.001) and CK ( = -0.48, = 0.032). The 24-h running race under extremely cold conditions led to a significant BF decrease, whereas SM and TBW remained stable in both males and females. Nevertheless, the increase in CK, Pcr and PU was related to the damage of SM with transient impaired renal function.

Abstract

To date, no study has focused on body composition characteristics and on parameters associated with skeletal muscle damage and renal function in runners participating in a 24-h winter race held under extremely cold environmental conditions (average temperature of -14.3°C). Anthropometric characteristics, plasma urea (PU), plasma creatinine (Pcr), creatine kinase (CK), plasma volume (PV) and total body water (TBW) were assessed pre- and post-race in 20 finishers (14 men and 6 women). In male runners, body mass (BM) ( = 0.003) and body fat (BF) ( = 0.001) decreased [-1.1 kg (-1.4%) and -1.1 kg (-13.4%), respectively]; skeletal muscle mass (SM) and TBW remained stable ( > 0.05). In female runners, BF decreased ( = 0.036) [-1.3 kg (-7.8%)] while BM, SM and TBW remained stable ( > 0.05). The change (Δ) in BM was not related to Δ BF; however, Δ BM was related to Δ SM [ = 0.58, = 0.007] and Δ TBW ( = 0.59, = 0.007). Δ SM correlated with Δ TBW ( = 0.51, = 0.021). Moreover, Δ BF was negatively associated with Δ SM ( = -0.65, = 0.002). PV ( < 0.001), CK ( < 0.001), Pcr ( = 0.004) and PU ( < 0.001) increased and creatinine clearance (CrCl) decreased ( = 0.002). The decrease in BM was negatively related to the increase in CK ( = -0.71, < 0.001). Δ Pcr was positively related to Δ PU ( = 0.64, = 0.002). The decrease in CrCl was negatively associated with the increase in both PU ( = -0.72, < 0.001) and CK ( = -0.48, = 0.032). The 24-h running race under extremely cold conditions led to a significant BF decrease, whereas SM and TBW remained stable in both males and females. Nevertheless, the increase in CK, Pcr and PU was related to the damage of SM with transient impaired renal function.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of General Practice
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2019
Deposited On:12 Jun 2019 14:57
Last Modified:01 Jul 2019 12:35
Publisher:Frontiers Research Foundation
ISSN:1664-042X
OA Status:Gold
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.3389/fphys.2019.00585
PubMed ID:31139095

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