Lockie Robert G, Balfany Katherine, Denamur Jenna K, Moreno Matthew R
Department of Kinesiology, California State University, Fullerton, Fullerton, CA, USA.
J Hum Kinet. 2019 Aug 21;68:157-166. doi: 10.2478/hukin-2019-0064. eCollection 2019 Aug.
A critical job task for law enforcement officers that should be influenced by strength is the body drag. This study analyzed relationships between absolute and relative strength measured by a one-repetition maximum hexagonal bar deadlift (1RM HBD), with body drags completed with 74.84 kg and 90.72 kg dummies. Twenty recreationally-trained individuals completed the 1RM HBD in one session, with peak power measured via a linear position transducer. Over two subsequent sessions, participants dragged the 74.84 kg and 90.72 kg dummies with two techniques. The first technique followed Californian standards, where participants wrapped their arms around the dummy and lifted it to standing before timing commenced. In the adapted technique, timing included the initial manipulation of the dummy. Participants dragged the dummy as quickly as possible over a 9.75 m distance. Partial correlations and linear regression (controlling for sex; p < 0.05) analyzed relationships between the HBD and body drags. The standard 74.84 kg body drag correlated with every HBD variable (r = -0.477 to -0.666), and was predicted by the absolute 1RM HBD (r = 0.467). The adapted 74.84 kg drag correlated with all HBD variables (r = -0.535 to - 0.754), and was predicted by peak power and the 1RM HBD (r = 0.758). Both 90.72 kg drags correlated with absolute and relative 1RM HBD (r = -0.517 to -0.670). Strength related to all body drags; peak power may be more important for drags with lighter loads. Strength training should be a focus in law enforcement to enhance drag performance.
对执法人员来说,受力量影响的一项关键工作任务是身体拖拽。本研究分析了通过单次重复最大重量六角杠铃硬拉(1RM HBD)测量的绝对力量和相对力量与使用74.84千克和90.72千克假人完成的身体拖拽之间的关系。20名接受过休闲训练的个体在一次训练中完成了1RM HBD,通过线性位置传感器测量峰值功率。在随后的两次训练中,参与者用两种技术拖拽74.84千克和90.72千克的假人。第一种技术遵循加利福尼亚标准,即参与者用手臂环绕假人并将其提至站立状态,然后开始计时。在改进技术中,计时包括对假人的初始操作。参与者尽可能快地将假人拖拽9.75米的距离。偏相关和线性回归(控制性别;p<0.05)分析了HBD与身体拖拽之间的关系。标准的74.84千克身体拖拽与每个HBD变量相关(r=-0.477至-0.666),并由绝对1RM HBD预测(r=0.467)。改进后的74.84千克拖拽与所有HBD变量相关(r=-0.535至-0.754),并由峰值功率和1RM HBD预测(r=0.758)。两种90.72千克的拖拽都与绝对和相对1RM HBD相关(r=-0.517至-0.670)。力量与所有身体拖拽相关;对于较轻负荷的拖拽,峰值功率可能更重要。力量训练应成为执法工作中的重点,以提高拖拽性能。