da Costa-Machado Renato Alexandre, Conceição Ana, Rocha Fernando, Branco Marco
Department of Sport Sciences, Sport Sciences School of Rio Maior, 2040-413 Rio Maior, Portugal.
Research Centre in Sports, Health and Human Development (CIDESD), 5000-801 Vila Real, Portugal.
Muscles. 2024 Oct 8;3(4):339-348. doi: 10.3390/muscles3040029.
Construction work is physically demanding. The tasks involved in this professional occupation physically exhaust workers and put them at high risk of injury. This work aimed to analyze muscle fatigue in civil construction workers with and without a history of physical activity. For this purpose, the muscle activity of the biceps femoris, trapezius transversalis, and erector spinae longissimus muscles was evaluated using surface electromyography. Eleven male civil construction workers aged 26 to 52 years (38.00 ± 9.60), seven of whom were untrained (N = 7) and four of whom were trained (N = 4), participated in this study. Each subject completed two assessments at two different times. A questionnaire was completed for the first assessment, and each subject's maximum repetition for the deadlift exercise was assessed. In the second assessment, the subjects were assessed while performing the deadlift in four different situations: 50%RM at rest, 70%RM at rest, 70%RM at fatigue, and 50%RM at fatigue. The trained construction workers had higher levels of muscle activity, and there were no significant differences in muscle activation between the fatigued and non-fatigued sets. There appears to be a strong influence of physical exercise on muscle activity and fatigue in civil construction workers.
建筑工作对体力要求很高。这项职业所涉及的任务会让工人身体极度疲劳，并使他们面临很高的受伤风险。这项研究旨在分析有或没有体育活动史的土木建筑工人的肌肉疲劳情况。为此，使用表面肌电图评估了股二头肌、横斜方肌和竖脊肌最长肌的肌肉活动。11名年龄在26至52岁（38.00±9.60）的男性土木建筑工人参与了这项研究，其中7人未受过训练（N = 7），4人受过训练（N = 4）。每个受试者在两个不同时间完成了两项评估。第一次评估完成了一份问卷，并评估了每个受试者硬拉练习的最大重复次数。在第二次评估中，受试者在四种不同情况下进行硬拉时接受评估：休息时50%RM、休息时70%RM、疲劳时70%RM和疲劳时50%RM。受过训练的建筑工人肌肉活动水平较高，疲劳组和非疲劳组之间的肌肉激活没有显著差异。体育锻炼似乎对土木建筑工人的肌肉活动和疲劳有很大影响。
