Institute of Sport, Exercise and Active Living, College of Sport and Exercise Science, Victoria University, Melbourne, Australia; Western Bulldogs Football Club, Melbourne, Australia.
Institute of Sport, Exercise and Active Living, College of Sport and Exercise Science, Victoria University, Melbourne, Australia.
J Sci Med Sport. 2014 Jan;17(1):113-8. doi: 10.1016/j.jsams.2013.02.013. Epub 2013 May 17.
To measure the activity profile, hydration status and core temperature of elite team sport athletes during matches in hot and cool conditions.
Thirty-five professional Australian footballers (age 25.9 ± 3.5 yrs; height 188.4 ± 7.8 cm; body mass 90.6 ± 8.8 kg), gave informed consent to participate in this study. Core temperature (T(c)), hydration and running performance were compared in eight hot and eight cool matches classified via a rating of the risk of heat illness from the Wet Bulb Globe Temperature (WBGT).
Core temperature was measured via an ingestible sensor before matches and after each quarter and player movement was recorded by 5 Hz GPS and expressed per period of the match (rotation), for distance; high-intensity running (HIR, 4.17-10.00 m s(-1)), sprinting (>4.17 m s(-1)) and maximal accelerations (2.78-10.00 m s(-2)). All data was compared for hot and cool matches and the magnitude of effects was analysed with the effect size (ES) statistic.
Core temperature was elevated from rest at all time-points during matches (37.3-39.4 °C), with small additional elevations after the first and third quarters in hot matches (ES: 0.39 ± 0.40 and 0.37 ± 0.42 respectively). In hot matches 12 players had T(c)>40 °C but only one in cool matches. Total distance was reduced in the latter parts of each half (-6.5%, -0.49 ± 0.58; and -6.7%, -0.57 ± 0.59), yet the high intensity tasks of sprinting and accelerating were preserved.
Players tolerated core temperatures up to 40.5 °C during hot matches but reduced the volume of running undertaken, thus preserving the ability to undertake high intensity activities.
测量在炎热和凉爽条件下，精英团队运动运动员在比赛中的活动水平、水合状态和核心体温。
35 名专业的澳大利亚足球运动员（年龄 25.9 ± 3.5 岁；身高 188.4 ± 7.8 厘米；体重 90.6 ± 8.8 公斤），同意参加这项研究。通过湿球黑球温度（WBGT）评估热疾病风险，将八场炎热比赛和八场凉爽比赛分类，比较核心体温（T(c)）、水合状态和跑动表现。
比赛前和每节比赛后，通过可食用传感器测量核心体温，球员的运动通过 5 Hz GPS 记录，并表示为比赛的每个时段（轮换）的距离；高强度跑动（HIR，4.17-10.00 m s(-1)）、冲刺（>4.17 m s(-1)）和最大加速度（2.78-10.00 m s(-2)）。比较炎热和凉爽比赛的数据，并使用效应大小（ES）统计分析效应大小。
在比赛的所有时间点，核心体温都从休息时升高（37.3-39.4°C），在炎热比赛的第一和第三节后略有升高（ES：0.39 ± 0.40 和 0.37 ± 0.42）。在炎热的比赛中，有 12 名球员的 T(c)>40°C，但在凉爽的比赛中只有 1 名。在每半场的后半部分，总距离减少（-6.5%，-0.49 ± 0.58；和-6.7%，-0.57 ± 0.59），但冲刺和加速等高强度任务得以保留。
在炎热的比赛中，球员可以耐受高达 40.5°C 的核心体温，但减少了跑动量，从而保留了进行高强度活动的能力。
