RELATIONSHIP BETWEEN HELMET TEMPERATURE AND TYMPANIC TEMPERATURE DURING AMERICAN FOOTBALL PRACTICE
RELATIONSHIP BETWEEN HELMET TEMPERATURE AND TYMPANIC TEMPERATURE DURING AMERICAN FOOTBALL PRACTICE
复制标题
美式足球训练期间头盔温度与鼓室温度之间的关系
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
S. Hori
中科院分区：
文献类型：
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作者：
T. Ishigaki;Hitone Fujishiro;J. Tsujita;Y. En;M. Yamato;S. Nakano;S. Hori
目的：本研究旨在探讨夏季美式足球训练期间头盔表面温度（Thl）、头顶温度（Thd）与鼓膜温度（Tty）之间的关系。方法：研究对象为美国大学橄榄球运动员。于1993年和1994年8月进行了温度测量。Thl、Thd和Tty用红外线鼓膜温度计测量。测量的环境温度为干球温度（Td）、湿球温度（Tw）、地球仪温度（GT）和湿球地球仪温度（WBGT）。结果：各温度间有显著相关性（P<0.0001）。在Thl、Thd和GT之间观察到高相关系数。在Thl和Thd之间观察到最高相关性（r=.727），在Tty和Td之间观察到最高相关性（r=.766）。Tty与Thl的相关系数高于Tty与Thd的相关系数。因子分析选取全身热应激因子（F1，热应激因子：Tty、Td、Tw和WBGT，比例=71.4%）和头部环境因子（F2，头盔因子：Thl、Thd和GT，比例=14.3%）。两个因素之间存在密切关系（r=.773）。GT和Thl都显示出与Thd的高度相关性，这表明通过头盔的辐射热对全身的影响。结论：头盔内温度是头部周围的微环境温度。因此，通过在足球练习期间频繁地脱下头盔来减少热负荷。（Jpn. J. Phys. Fitness Sports Med. 2001，50：333-338）关键词：美式足球，鼓膜温度，头盔温度，环境温度
Purpose: The purpose of this study was to examine the relationship among helmet surface temperature (Thl), head top temperature (Thd) and tympanic temperature (Tty) during American football practice in summer. Methods : The subjects were collegiate American football players. Tem peratures were measured in August in 1993 and 1994. Thl, Thd and Tty were measured by infrared tympanic thermometers. Environmental temperatures that were measured were dry-bulb temperature (Td), wet-bulb temperature (Tw), globe temperature (GT) and wet-bulb globe temperature (WBGT). Results: Significant correlations were observed among all measured temperatures (P<0.0001). High coefficients of correlation were observed among Thl, Thd and GT. The highest relationships were observed between Thl and Thd (r=.727), and between Tty and Td (r=.766). The coefficient of correlation between Tty and Thl was higher than that between Tty and Thd. Heat stress of the whole body (F1; heat stress factor: Tty, Td, Tw and WBGT, proportion=71.4%) and head environment factor (F2 ; helmet factor : Thl, Thd and GT, proportion=14.3%) were chosen in factor analysis. A close relationship was observed between both factors (r=.773). Both GT and Thl showed a high correlation with Thd, which suggests the influence of radiant heat through a helmet on the whole body. Conclusion : The temperature in a helmet is a micro environment temperature surrounding the head. Accordingly, the heat load is reduced by taking the helmet off frequently dur ing football practice. (Jpn. J. Phys. Fitness Sports Med. 2001, 50 : 333-338) key word : American football, Tympanic temperature, Helmet temperature, Environmental temperature