Genaidy A M
University of Cincinnati, OH 45221-0072.
Ergonomics. 1991 Jan;34(1):1-11. doi: 10.1080/00140139108967283.
The primary objectives of this study were to test whether the muscular endurance, muscular strength, cardiovascular endurance, and workload perception of individuals engaged in combined manual handling tasks could be improved through a short and intensive physical training programme. Two separate experiments were conducted to achieve the objectives of this study. The independent variables studied in each experiment were group type (training and control) and training session. Twenty male subjects participated in these experiments. The task performed in the first experiment was a combined lifting, lowering, pushing, pulling, and carrying activity. The second experiment featured an upper extremity manual handling task. Results indicated that, for both experiments, endurance time increased and heart rate decreased significantly during the course of training. For experiment 1, there were no significant changes in either static or dynamic strength with training. On the other hand, significant increases in static and dynamic strength were observed with the training group of experiment 2. The results of this study suggest that it is possible to improve muscular endurance and cardiovascular endurance with a short and intensive training programme. Moreover, an endurance training programme may increase both static and dynamic strength only if the weight of load handled during the training programme taxes the subject to 50% or more of his/her initial dynamic strength.
本研究的主要目的是测试通过短期强化体能训练计划，从事综合体力搬运任务的个体的肌肉耐力、肌肉力量、心血管耐力和工作量感知是否能够得到改善。为实现本研究的目标，进行了两项独立实验。每个实验中研究的自变量为组类型（训练组和对照组）和训练课程。20名男性受试者参与了这些实验。第一个实验中执行的任务是一项包括提举、放下、推、拉和搬运的综合活动。第二个实验的特点是上肢体力搬运任务。结果表明，在两个实验中，训练过程中耐力时间均显著增加，心率显著下降。在实验1中，训练前后的静态或动态力量均无显著变化。另一方面，在实验2的训练组中，观察到静态和动态力量均显著增加。本研究结果表明，通过短期强化训练计划有可能提高肌肉耐力和心血管耐力。此外，只有当训练计划中搬运的负荷重量使受试者承受其初始动态力量的50%或更多时，耐力训练计划才可能增加静态和动态力量。
