Emerson Dawn M, Torres-McGehee Toni Marie, Yeargin Susan W, Kelly Melani R, Uriegas Nancy, Smith Allison B, Weber Samantha R, Hirschhorn Rebecca M, Cannon Cormac
Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence.
Department of Physical Therapy and Rehabilitation Science, University of Kansas Medical Center, Kansas City.
J Athl Train. 2021 Mar 1;56(3):302-310. doi: 10.4085/1062-6050-0245.20.
To our knowledge, no researchers have investigated thermoregulatory responses and exertional heat illness (EHI) risk factors in marching band (MB) artists performing physical activity in high environmental temperatures.
To examine core temperature (Tc) and EHI risk factors in MB artists.
Descriptive epidemiology study.
Three rehearsals and 2 football games for 2 National Collegiate Athletic Association Division I institution's MBs.
Nineteen volunteers (females = 13, males = 6; age = 20.5 ± 0.9 years, height = 165.1 ± 7.1 cm, mass = 75.0 ± 19.1 kg) completed the study.
MAIN OUTCOME MEASURE(S): We measured Tc, wet bulb globe temperature, and relative humidity preactivity, during activity, and postactivity. Other variables were activity time and intensity, body surface area, hydration characteristics (fluid volume, sweat rate, urine specific gravity, percentage of body mass loss), and medical history (eg, previous EHI, medications). The statistical analysis consisted of descriptive information (mean ± standard deviation), comparative analyses that determined differences within days, and correlations that identified variables significantly associated with Tc.
The mean time for rehearsals was 102.8 ± 19.8 minutes and for games was 260.5 ± 47.7 minutes. Mean maximum Tc was 39.1 ± 1.1°C for games and 38.4 ± 0.7°C for rehearsals; the highest Tc (41.2°C) occurred during a game. Fluid consumption did not match sweat rates (P < .001). Participants reported to games in a hypohydrated state 63.6% of the time. The maximum Tc correlated with the maximum wet bulb globe temperature (r = 0.618, P < .001) and was higher in individuals using mental health medications (rpb = -0.254, P = .022) and females (rpb = 0.330, P = .002). Body surface area (r = -0.449, P < .001) and instrument mass (r = -0.479, P < .001) were negatively correlated with Tc.
Marching band artists experienced high Tc during activity and should have access to athletic trainers who can implement EHI-prevention and -management strategies.
据我们所知，尚无研究人员调查过高环境温度下进行体育活动的军乐队（MB）成员的体温调节反应和运动性热疾病（EHI）风险因素。
研究军乐队成员的核心体温（Tc）和EHI风险因素。
描述性流行病学研究。
两所美国国家大学体育协会第一分区院校的军乐队进行了3次排练和2场足球比赛。
19名志愿者（女性13名，男性6名；年龄=20.5±0.9岁，身高=165.1±7.1厘米，体重=75.0±19.1千克）完成了该研究。
我们在活动前、活动期间和活动后测量了Tc、湿球黑球温度和相对湿度。其他变量包括活动时间和强度、体表面积、水合特征（液体量、出汗率、尿比重、体重减轻百分比）和病史（如既往EHI、药物治疗）。统计分析包括描述性信息（均值±标准差）、确定日内差异的比较分析以及确定与Tc显著相关变量的相关性分析。
排练的平均时间为102.8±19.8分钟，比赛的平均时间为260.5±47.7分钟。比赛时平均最高Tc为39.1±1.1°C，排练时为38.4±0.7°C；最高Tc（41.2°C）出现在一场比赛期间。液体摄入量与出汗率不匹配（P<.001）。参与者在63.6%的时间里以低水合状态参加比赛。最高Tc与最高湿球黑球温度相关（r=0.618，P<.001），在使用精神健康药物的个体中更高（rpb=-0.254，P=.022），在女性中也更高（rpb=0.330，P=.002）。体表面积（r=-0.449，P<.001）和乐器重量（r=-0.479，P<.001）与Tc呈负相关。
军乐队成员在活动期间经历了高温，应该能够接触到可以实施EHI预防和管理策略的运动训练师。
