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- Title
Thermal stress, hydration, and salivary and respiratory stress markers in curling players performing a match in the cold.
- Authors
Tanabe, Yoko; Suzuki, Sakiko; Kojima, Jumpei; Matsui, Takashi; Watanabe, Koichi; Nishiyasu, Takeshi; Fujii, Naoto
- Abstract
Curling is a target‐based team sport played in a cold environment. The type of stress curling players face during a curling match remains to be determined. In the present study, 16 Japanese curling players performed a practice curling match (six ends lasting 90 min), wherein the following variables were documented: core and skin temperatures, heart rate, thermal sensation and comfort, urine‐specific gravity, body fluid loss, salivary cortisol, α‐amylase activity, salivary secretory immunoglobulin A (SIgA), and fractionated exhaled nitric oxide (FeNO, a respiratory stress marker). Pre‐match resting core temperature was 37.24 ± 0.31°C, which increased up to 37.73 ± 0.41°C during the match (p < 0.001). Facial skin temperatures decreased after the match (all p ≤ 0.015), whereas finger skin temperatures remained unchanged (p ≥ 0.375). Thermal discomfort increased following the match but thermal sensation remained unchanged. Following the match, players lost 0.29 ± 0.15 L body fluid (sweat, respiratory evaporation, and urine), which was nearly compensated by fluid ingestion of 0.22 ± 0.13 L (p = 0.119). Nevertheless, urine‐specific gravity increased from 1.021 ± 0.010 to 1.024 ± 0.008 after the match (p = 0.012), with 31% and 50% players being dehydrated at pre‐ and post‐match, respectively. Salivary cortisol decreased (p < 0.001) after the match without changes in salivary SIgA, α‐amylase activity, and FeNO (all p ≥ 0.113). Therefore, during a curling match, the core temperature and thermal discomfort increase, whereas the face skin temperature decreases. Additionally, players may undergo dehydration before the match, which could be exacerbated after the match.
- Subjects
JAPAN; NITRIC oxide analysis; SALIVA analysis; IMMUNOGLOBULIN analysis; PHYSIOLOGICAL stress; HYDRATION; RESPIRATORY diseases; BIOMARKERS; BODY temperature; SPECIFIC gravity; WINTER sports; SKIN temperature; AMYLASES; PRE-tests &; post-tests; DEHYDRATION; HEART beat; URINALYSIS; SOMATOSENSORY disorders; HYDROCORTISONE
- Publication
Scandinavian Journal of Medicine & Science in Sports, 2023, Vol 33, Issue 7, p1079
- ISSN
0905-7188
- Publication type
Article
- DOI
10.1111/sms.14356