Abstract

The main aim was to investigate the influence of various distracting stimuli on the endurance-strength and fatigue of the lumbar region in asymptomatic participants. Fifty-four healthy individuals were randomised to three groups: auditory distraction group (ADG), visual distraction group (VDG) and control group without distraction (CG). Lumbar muscle endurance and perceived fatigue were the outcome measures. Lumbar muscle endurance was assessed with the Biering-Sorensen test, and perceived fatigue was assessed with the modified Borg scale, once baseline and second with the distraction intervention. Lumbar muscle endurance showed significant changes over time, and there were intragroup differences for VDG and ADG. The direct comparison did show significant differences between both distraction groups with respect to the control group with a large effect size (ΔVDG-CG: p < 0.001, d = 1.55 and, ΔADG-CG: p = 0.008, d = 1.07) but not between the two distraction groups (ΔVDG-VDG: p = 0.56). Fatigue showed significant changes over time but not for group*time interaction, revealing intragroup differences for VDG and ADG. There were no intragroup differences in the CG for muscle resistance or fatigue, and there were no between-group differences. Auditory and visual distractors might produce a significant increase in muscle resistance during the Biering-Sorensen test. Both techniques are valid for increasing lumbar muscle endurance but also both stimuli produced a higher level of fatigue or perception of effort once the test was completed when compared with CG. Finally, we were unable to demonstrate that one type of stimulus produces superior results to the other.

摘要

主要目的是研究各种分散注意力的刺激对无症状参与者腰部耐力强度和疲劳的影响。54 名健康人随机分为三组：听觉分心组 (ADG)、视觉分心组 (VDG) 和无分心对照组 (CG)。腰肌耐力和感知疲劳是结果指标。用 Biering-Sorensen 测试评估腰肌耐力，用改良的 Borg 量表评估感知疲劳，一次是基线，第二次是分心干预。随着时间的推移，腰肌耐力表现出显着变化，VDG 和 ADG 存在组内差异。p  < 0.001, d  = 1.55 和, ΔADG-CG: p  = 0.008, d  = 1.07) 但不在两个分心组之间 (ΔVDG-VDG: p = 0.56）。疲劳随着时间的推移显示出显着变化，但组*时间相互作用没有，揭示了 VDG 和 ADG 的组内差异。肌肉阻力或疲劳的 CG 没有组内差异，也没有组间差异。在 Biering-Sorensen 测试期间，听觉和视觉干扰物可能会显着增加肌肉阻力。这两种技术对于增加腰肌耐力都是有效的，但与 CG 相比，一旦测试完成，两种刺激都会产生更高水平的疲劳或努力感。最后，我们无法证明一种刺激会产生比另一种更好的结果。