Sovijärvi A R, Rosset S, Hyvärinen J, Franssila A, Graeffe G, Lehtimäki M
Eur J Appl Physiol Occup Physiol. 1979 Aug;41(4):285-91. doi: 10.1007/BF00429745.
The influence of ionization of air on heart rate (HR) and ratings of perceived exertion (RPE) during bicycle exercise was studied in nine healthy medical students selected according to a randomized schedule from the class of 90 students. The exercise tests were performed both under negative and positive ionization. The study was made with a double-blind, cross-over design. The body surface exposed to ionic current was made large by reducing the clothing of the subject. A significant overall tendency to lower HR and RPE values under negative ionization was observed (p less than 0.01, sign tests). The RPE values were significantly lower (p less than 0.01, paired t-test and the Wilcoxon test) under negative than under positive ionization at the maximal work load level but not at other relative load levels. However, when separately tested at each relative load level HR values did not differ significantly in negative and positive ionization. The results of this pilot study indicate that ionic composition of the air can modify the RPE and possibly also HR during exercise; negative air ionization seems to be beneficial compared with positive ionization. The mechanisms involved are obscure, but we suggest that negative ionization of air may increase oxidative metabolism through generation of a superoxide radical (O2-) that is reduced to H2O2 by superoxide dismutases.
从90名学生的班级中按照随机安排挑选出9名健康医学生，研究了空气电离对自行车运动期间心率（HR）和自觉用力程度（RPE）的影响。运动测试在负离子化和正离子化条件下均进行。该研究采用双盲交叉设计。通过减少受试者的衣物，使暴露于离子电流的身体表面积增大。观察到在负离子化条件下HR和RPE值有显著的总体下降趋势（p<0.01，符号检验）。在最大工作负荷水平下，负离子化时的RPE值显著低于正离子化时（p<0.01，配对t检验和威尔科克森检验），但在其他相对负荷水平下并非如此。然而，在每个相对负荷水平分别测试时，负离子化和正离子化时的HR值没有显著差异。这项初步研究的结果表明，空气中的离子成分在运动期间可改变RPE，也可能改变HR；与正离子化相比，空气负离子化似乎有益。其中涉及的机制尚不清楚，但我们认为空气负离子化可能通过产生超氧阴离子自由基（O2-）增加氧化代谢，超氧阴离子自由基可被超氧化物歧化酶还原为H2O2。
