Nazari Goris, MacDermid Joy C, Sinden Kathryn E, Overend Tom J
Health & Rehabilitation Science, Physiotherapy, Western University, London, ON, Canada.
Roth McFarlane Hand and Upper Limb Centre, St. Joseph's Hospital, London, ON, Canada.
Rehabil Res Pract. 2018 Apr 12;2018:3234176. doi: 10.1155/2018/3234176. eCollection 2018.
The overall aim of this study was to measure the physiological responses of firefighters from a single fire service during simulated functional firefighting tasks and to establish the relationship between physical fitness parameters and task performance. 46 males and 3 females firefighters were recruited. Firefighters' aerobic capacity levels were estimated using the Modified Canadian Aerobic Fitness Test (mCAFT). Grip strength levels, as a measure of upper body strength levels, were assessed using a calibrated J-Tech dynamometer. The National Institute for Occupational Safety and Health (NIOSH) protocol for the static floor lifting test was used to quantify lower body strength levels. Firefighters then performed two simulated tasks: a hose drag task and a stair climb with a high-rise pack tasks. Pearson's correlation coefficients () were calculated between firefighters' physical fitness parameters and task completion times. Two separate multivariable enter regression analyses were carried out to determine the predictive abilities of age, sex, muscle strength, and resting heart rate on task completion times. Our results displayed that near maximal heart rates of ≥88% of heart rate maximum were recorded during the two tasks. Correlation () ranged from -0.30 to 0.20. For the hose drag task, cardiorespiratory fitness and right grip strength (kg) demonstrated the highest correlations of -0.30 and -0.25, respectively. In predicting hose drag completion times, age and right grip strength scores were shown to be the statistically significant ( < 0.05) independent variables in our regression model. In predicting stair climb completion times, age and NIOSH scores were shown to be the statistically significant ( < 0.05) independent variables in our regression model. In conclusion, the hose drag and stair climb tasks were identified as physiological demanding tasks. Age, sex, resting heart rate, and upper body/lower body strength levels had similar predictive values on hose drag and stair climb completion times.
本研究的总体目标是测量来自单一消防部门的消防员在模拟功能性灭火任务期间的生理反应，并建立体能参数与任务表现之间的关系。招募了46名男性消防员和3名女性消防员。使用改良的加拿大有氧适能测试（mCAFT）评估消防员的有氧能力水平。使用校准的J-Tech测力计评估握力水平，作为上身力量水平的一项指标。采用美国国家职业安全与健康研究所（NIOSH）的静态地面抬举测试方案来量化下肢力量水平。消防员随后执行两项模拟任务：水带拖拽任务和背负高层背包爬楼梯任务。计算消防员体能参数与任务完成时间之间的皮尔逊相关系数（）。进行了两项独立的多变量逐步回归分析，以确定年龄、性别、肌肉力量和静息心率对任务完成时间的预测能力。我们的结果显示，在这两项任务期间记录到接近最大心率，即心率最大值的≥88%。相关性（）范围为-0.30至0.20。对于水带拖拽任务，心肺适能和右手握力（千克）的相关性最高，分别为-0.30和-0.25。在预测水带拖拽完成时间时，年龄和右手握力得分在我们的回归模型中显示为具有统计学意义（<0.05）的自变量。在预测爬楼梯完成时间时，年龄和NIOSH得分在我们的回归模型中显示为具有统计学意义（<0.05）的自变量。总之，水带拖拽和爬楼梯任务被确定为生理需求较高的任务。年龄、性别、静息心率以及上身/下身力量水平对水带拖拽和爬楼梯完成时间具有相似的预测价值。
