Faculty of Kinesiology, Sport, and Recreation, University of Alberta, Edmonton, AB T6G 2H9, Canada.
Fitness and Active Lifestyle Unit, Edmonton Police Service, Edmonton, AB T5H 087, Canada.
Appl Physiol Nutr Metab. 2020 Mar;45(3):301-310. doi: 10.1139/apnm-2019-0230. Epub 2019 Jul 30.
This 2-part study examined the impact of general duty police ensemble on selected cardiopulmonary responses during incremental treadmill exercise and on simulated work performance in 25 healthy young male and female participants. Part I comprised randomly ordered treadmill tests in 2 experimental conditions: physical training (PT; undergarments, shorts, t-shirt, and running shoes) and police duty ensemble (PDE; undergarments, body armour, patrol uniform, boots, duty belt with required equipment, radio, and weapons). The PDE added 10.3 kg (SD 0.4) or 14% (SD 2) body mass. Participants walked at 5.6 km·h, starting at 0% grade with 2% increases in grade every 2 min. The 4% stage was 6 min in duration to achieve physiological steady state. Subsequently, the 2-min increments continued to exhaustion. Part II evaluated performance time on a recognized job-related work simulation circuit, in 3 experimental conditions: () PT, () weighted belt (WB; PT plus a 7.5 kg weighted belt), and () PDE. In Part I, physiological responses (e.g., oxygen uptake, ventilation, heart rate) were elevated ( < 0.05) with PDE during submaximal exercise but peak values were unchanged. Test duration and peak power output were significantly reduced with PDE. In Part II, circuit completion time was increased in PDE but not WB when compared with PT ( < 0.05). Heart rate and perceived exertion were similar in all conditions and perceived dyspnea was higher in PDE. Police duty ensemble negatively affected exercise performance more than would be expected due to load mass alone. Specificity must be considered when simulating occupational load carriage.
这项两部分研究考察了普通制服对递增式跑步机运动期间选定心肺反应的影响，以及对 25 名健康年轻男性和女性参与者模拟工作表现的影响。第一部分包括在两种实验条件下进行的随机排序跑步机测试：体能训练（PT；内衣、短裤、t 恤和跑鞋）和警察制服（PDE；内衣、防弹衣、巡逻制服、靴子、配有所需装备的腰带、收音机和武器）。PDE 增加了 10.3 公斤（SD 0.4）或 14%（SD 2）的体重。参与者以 5.6 公里/小时的速度行走，从 0%的坡度开始，每 2 分钟增加 2%的坡度。4%的阶段持续 6 分钟，以达到生理稳态。随后，2 分钟的增量继续到力竭。第二部分在三种实验条件下评估了在公认的与工作相关的工作模拟电路上的表现时间：()PT，()负重带（WB；PT 加一个 7.5 公斤的负重带）和()PDE。在第一部分，生理反应（例如，摄氧量、通气量、心率）在 PDE 下在亚最大运动期间升高（<0.05），但峰值值保持不变。PDE 显著缩短了测试持续时间和峰值功率输出。在第二部分，与 PT 相比，PDE 时电路完成时间增加，但 WB 时未增加（<0.05）。在所有条件下，心率和感知用力相似，而 PDE 时感知呼吸困难更高。警察制服对运动表现的影响比仅因负荷质量而预期的更大。在模拟职业负荷运输时，必须考虑特异性。
