文摘
运动耐量和可能的哮喘儿童的限制在工作能力仍是一个有争议的问题。本研究的目的是比较通风和气体交换反应的哮喘儿童与健康对照组。运动性能评估80年轻度到中度哮喘患儿,年龄7 - 15年,并在80年健康对照组与年龄、身高、体重和习惯性的身体活动水平。孩子们在跑步机上进行了极限运动测试,在此期间耗氧量(V 'O2),二氧化碳输出(V 'CO2)和每分通气量(V本部)连续测定。没有给哮喘儿童术前用药法。一秒用力呼气量(FEV1)静止是93 + /预测的-11%哮喘儿童和95 + / - -9% pred控制。运行后,平均FEV1下降13.9%(范围0 - 57%)和1.6% (0 - 9%)(p < 0.001)。两组取得了类似的最大摄氧量(V 'O2, max)((意思是+ / -标准差)40.3 + / - -8.4和42.6 + / - -9.6毫升x分钟(1)千克(1)在哮喘患者和控制,分别;NS)和最大每分通气量输出(V得名max)(42.9 + / - -14.8和45.7 + / - -14.9 L x分钟(1)分别;NS)。 The kinetics of V'O2, V'CO2 and V'E during the test revealed no differences between the two populations. Moreover, anaerobic threshold and oxygen pulse were the same in the two groups. Asthmatics showed a ventilatory pattern with lower respiratory frequencies and greater tidal volumes during the run. These results suggest that asthmatic children can achieve a level of exercise performance similar to that of healthy children, provided that they have a comparable level of habitual physical activity. The only difference found concerned the ventilatory pattern of the asthmatic children, which was characterized by a reduced respiratory frequency and greater tidal volume at the same minute ventilation. The level of physical conditioning was found to be the main determinant of exercise tolerance for children with controlled asthma.