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The effect of endurance training on exercise-induced bronchospasm.

耐力训练对运动引起的支气管痉挛的影响。

基本信息

批准号：
02680120
负责人：
SHINDO Munehiro
金额：
$ 1.73万
依托单位：
Fukuoka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

Asthmatic children often experience limitations of their physical activity due to exercise induced bronchospasms (EIB). It is therefore necessary to control their EIB in order to help them in their physical and social maturation. In this study we attempt to clarify the risk factors and the exercise conditions which relate to the severity of EIB, based on the physiological responses measured during various intensities of aerobic exercise and thus determined the optimal intensity of exercise therapy in asthmatic children. Finally, the influence of endurance training on the EIB was also investigated.In the first year of a three-year study, the effects of exercise intensity on EIB was evaluated in order to determine the optimal exercise intensity for exercise therapy. Based on our findings, the severity of EIB was found to depend on the exercise intensity. It was also determined that a 125% intensity of the lactate threshold (125% LT) is the upper limit of exercise intensity which allows a … More sthmatic children to improve their aerobic working capacity and perform without suffering any severe bronchospasms. In the second year of this study, endurance training was performed on a cycle ergometer for 30min, 6times a week for 4weeks at 125% LT.As a result, endurance training improved their aerobic capacity and also reduced the severity of EIB at an absolute work load. It was thus suggested that the reduction in the severity of EIB was attributable to the increase in the aerobic capacity. We then prolonged the training term for 2 months. After 2 months of endurance training, the severity of EIB was found to have reduced not only the absolute but also the relative work load. This reduction in the severity of EIB at a relative work load indicates that some changes in the clinical factors which cause EIB might occur due to exercise training. In the third year of this study, the influence of detraining for 3 weeks on the effect of endurance training for 6 weeks, EIB, bronchial hyperreactivity and aerobic working capacity was examined. Based on our findings, the loss of adaptation for EIB and bronchial hyperreactivity may be slower than that of the aerobic working capacity following detraining. Endurance training thus appears to alter some of the clinical factors which cause EIB.It was therefore concluded that endurance training not only improved the aerobic working capacity but also reduced the severity of EIB and bronchial hyperreactivity, and is thus considered to be an effective therapy for improving clinical manifestations. Less

哮喘儿童经常由于运动诱发的支气管痉挛（EIB）而受到身体活动的限制。因此，有必要控制他们的EIB，以帮助他们在身体和社会方面成熟。在本研究中，我们试图澄清的危险因素和运动条件，与EIB的严重程度，根据不同强度的有氧运动过程中测量的生理反应，从而确定最佳强度的运动治疗哮喘儿童。最后，本研究亦探讨耐力训练对EIB的影响，在为期三年的研究中，于第一年评估不同运动强度对EIB的影响，以确定运动治疗的最佳运动强度。根据我们的研究结果，EIB的严重程度取决于运动强度。还确定了125%强度的乳酸盐阈值（125%LT）是运动强度的上限，其允许运动强度的增加。 ...更多信息哮喘儿童，以提高他们的有氧工作能力和执行没有遭受任何严重的支气管痉挛。在研究的第二年，在自行车功率计上进行耐力训练，每次30分钟，每周6次，共4周，在125%LT下进行。结果，耐力训练提高了他们的有氧能力，并降低了绝对工作负荷下EIB的严重程度。因此，EIB严重程度的降低可归因于有氧能力的增加。然后，我们延长了两个月的培训期。经过2个月的耐力训练后，发现EIB的严重程度不仅降低了绝对工作负荷，而且降低了相对工作负荷。在相对工作负荷下EIB严重程度的降低表明，运动训练可能会导致导致EIB的临床因素发生某些变化。在研究的第三年，研究了停训3周对6周耐力训练效果、EIB、支气管高反应性和有氧工作能力的影响。根据我们的研究结果，EIB和支气管高反应性的适应性丧失可能比停训后有氧工作能力的丧失慢。因此，耐力训练似乎改变了引起EIB的一些临床因素，因此，耐力训练不仅提高了有氧工作能力，而且降低了EIB的严重程度和支气管高反应性，因此被认为是改善临床表现的有效疗法。少