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首页> 外文期刊>Upsala journal of medical sciences >Exercise-Induced Bronchoconstriction in Adults with Asthma
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Exercise-Induced Bronchoconstriction in Adults with Asthma

机译：运动引起的成人哮喘支气管收缩

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The bronchial response to cycling and running was compared in six adult asthmatic persons. The effects of different air conditions during cycling regarding the induction of bronchoconstriction was studied. The exercise consisted of 6 minutes' work at an intensity of 80–85% of maximal heart rate. Heart rate, oxygen consumption and ventilation were measured to check that the exercise level was the same in all tests. Peak expiratory flow (PEF) was used to test for bronchoconstriction. Bicycling and treadmill running were performed under indoor conditions and bicycling while breathing cold, dry air (?18°C) and room-tempered humid air (60% RH), respectively. No difference in bronchoconstriction was found between cycling and running under indoor conditions. However, bicycling exercise with inhalation of cold dry air provoked more bronchoconstriction than when inhalating humid air (PEF reductions of 19.4 ± 6% and 6.1 ± 2%, respectively). No differences were found between the exercise modes in heart rate, oxygen consumption, ventilation per minute, respiratory rate, carbon dioxide elimination or subjective ratings of perceived exertion and breathlessness. It is concluded that it is not the type of exercise, but the ventilation demand and humidity of the inspired air that are the main determinants of the occurrence and degree of bronchoconstriction.
机译：比较了六名成人哮喘患者对自行车和跑步的支气管反应。研究了在骑行过程中不同空气条件对支气管收缩的诱导作用。锻炼包括6分钟的工作，强度为最大心率的80–85％。测量心率，氧气消耗和通气量以检查所有测试中的运动水平是否相同。呼气峰值流量（PEF）用于测试支气管收缩。骑自行车和跑步机在室内条件下进行，骑自行车时分别呼吸冷空气，干燥空气（约18°C）和室温湿空气（60％RH）。在室内条件下骑行和跑步之间没有发现支气管收缩的差异。但是，与吸入潮湿空气时相比，吸入冷干燥空气进行骑自行车运动会引起更多的支气管收缩（PEF分别降低19.4±6％和6.1±2％）。在心率，耗氧量，每分钟通气量，呼吸频率，二氧化碳消除或主观感觉的劳累和呼吸困难等运动模式之间没有发现差异。结论是，不是运动的类型，而是通气需求和吸入空气的湿度是支气管狭窄发生和程度的主要决定因素。

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