Department of Psychology, Stockholm University, Sweden.
Scand J Med Sci Sports. 2010 Aug;20(4):644-50. doi: 10.1111/j.1600-0838.2009.00985.x. Epub 2009 Jul 2.
The features of perceived symptoms causing discontinuation of strenuous exercise have been scarcely studied. The aim was to characterize the two main symptoms causing the discontinuation of heavy work in healthy persons as well as describe the growth of symptoms during exercise. Breathlessness (b) and leg fatigue (l) were assessed using the Borg CR10 Scale and the Borg CR100 (centiMax) Scale, during a standardized exercise test in 38 healthy subjects (24-71 years). The b/l-relationships were calculated for terminal perceptions (ERI(b/l)), and the growth of symptoms determined by power functions for the whole test, as well as by growth response indexes (GRI). This latter index was constructed as a ratio between power levels corresponding to a very strong and a moderate perception. In the majority (71%) of the test subjects, leg fatigue was the dominant symptom at the conclusion of exercise (P<0.001) and the b/l ratio was 0.77 (CR10) and 0.75 (CR100), respectively. The GRI for breathlessness and leg fatigue was similar, with good correlations between GRI and the power function exponent (P<0.005). In healthy subjects, leg fatigue is the most common cause for discontinuing an incremental exercise test. The growth functions for breathlessness and leg fatigue during work are, however, almost parallel.
感知导致停止剧烈运动的症状特征很少被研究。本研究旨在描述导致健康人停止重体力劳动的两个主要症状（呼吸困难和腿部疲劳），并描述运动过程中症状的增长情况。38 名健康受试者（24-71 岁）在标准化运动测试中使用 Borg CR10 量表和 Borg CR100（centiMax）量表评估呼吸困难（b）和腿部疲劳（l）。计算了终端感知时的 b/l 关系（ERI(b/l)），并通过幂函数确定了整个测试的症状增长，以及生长反应指数（GRI）。该指数构建为与非常强烈和中度感知相对应的幂级别的比值。在大多数（71%）受试者中，腿部疲劳是运动结束时的主要症状（P<0.001），b/l 比分别为 0.77（CR10）和 0.75（CR100）。呼吸困难和腿部疲劳的 GRI 相似，GRI 与幂函数指数之间具有良好的相关性（P<0.005）。在健康受试者中，腿部疲劳是停止递增运动试验最常见的原因。然而，工作期间呼吸困难和腿部疲劳的增长函数几乎是平行的。
