Puetz Timothy W, Flowers Sara S, O'Connor Patrick J
Department of Kinesiology, University of Georgia, Athens, GA, USA.
Psychother Psychosom. 2008;77(3):167-74. doi: 10.1159/000116610. Epub 2008 Feb 14.
There is growing evidence that chronic exercise is a promising intervention for combating feelings of low energy and fatigue. Although groups with well-defined medical conditions (for example cancer and heart disease) or unexplained fatigue syndromes consistently have reported improved feelings of energy and fatigue after chronic exercise, relatively few exercise training studies have been conducted with people who report persistent fatigue yet neither have a medical condition nor reach diagnostic criteria for an unexplained fatigue syndrome. The purpose of this investigation was to use a randomized controlled design to examine the effects of 6 weeks of chronic exercise training on feelings of energy and fatigue in sedentary, healthy young adults reporting persistent fatigue.
Thirty-six healthy, young adults who reported persistent feelings of fatigue were randomly assigned to a moderate-intensity exercise, low-intensity exercise or no treatment control group. Participants in each condition then visited the exercise laboratory on 18 occasions over a 6-week period. Exercise laboratory visits occurred 3 days per week. Vigor and fatigue mood state scores were obtained at the beginning of the third exercise session each week for 6 weeks. Aerobic fitness was measured before and after intervention.
The effect of 6 weeks of exercise training on feelings of fatigue was dependent on exercise intensity; however, the effect on feelings of energy was similar for both the low- and moderate-intensity conditions. The changes in feelings of energy and fatigue were independent of changes in aerobic fitness.
Six weeks of low and moderate exercise training performed by sedentary adults without a well-defined medical condition or an unexplained fatigue syndrome but reporting persistent feelings of fatigue resulted in similarly beneficial effects on feelings of energy. The effects for symptoms of fatigue were moderated by exercise intensity, and the more favorable outcome was realized with low-intensity exercise. Changes in feelings of energy and fatigue following exercise training were unrelated to changes in aerobic fitness.
越来越多的证据表明，长期锻炼是对抗精力不足和疲劳感的一种有前景的干预措施。尽管患有明确疾病（如癌症和心脏病）或不明原因疲劳综合征的群体一直报告称，长期锻炼后精力和疲劳感有所改善，但针对那些自述持续疲劳但既无疾病又未达到不明原因疲劳综合征诊断标准的人群所开展的运动训练研究相对较少。本研究的目的是采用随机对照设计，检验为期6周的长期运动训练对久坐不动、健康的自述持续疲劳的年轻成年人精力和疲劳感的影响。
36名自述持续疲劳感的健康年轻成年人被随机分配到中等强度运动组、低强度运动组或无治疗对照组。每种情况下的参与者在6周内分18次前往运动实验室。运动实验室访问每周进行3天。在为期6周的时间里，每周第三次运动训练开始时获取活力和疲劳情绪状态评分。在干预前后测量有氧适能。
为期6周的运动训练对疲劳感的影响取决于运动强度；然而，低强度和中等强度运动对精力感的影响相似。精力和疲劳感的变化与有氧适能的变化无关。
对于无明确疾病或不明原因疲劳综合征但自述持续疲劳感的久坐不动的成年人，进行为期6周的低强度和中等强度运动训练对精力感产生了类似的有益影响。运动强度对疲劳症状的影响较为缓和，低强度运动取得了更有利的结果。运动训练后精力和疲劳感的变化与有氧适能的变化无关。
