Reilly T, Stevenson I C
Centre for Sport and Exercise Sciences, School of Human Sciences, Liverpool John Moores University, England.
J Hum Ergol (Tokyo). 1993 Jun;22(1):1-9.
The influence of negative air ions on rectal temperature (Tr), heart rate (HR), oxygen uptake (VO2) and ventilation (VE) was examined in male subjects (n = 8) at rest and during two successive exercise bouts of 90 W and 180 W, each for 20 min on a cycle ergometer. Exposures at 4 different times of day (01:30, 10:00, 14:00 and 18:00 h) were presented to subjects under experimental and control conditions using a cross-over design. Results indicated that negative air ions significantly reduced resting values of all physiological variables (p between 0.05 and 0.01): these effects tended to disappear under exercise conditions, except for Tr. There was no significant effect of air ions on state anxiety pre- or post-exercise or on the perception of effort (p > 0.05). The significant circadian rhythm in Tr was reduced in amplitude by air ionisation although it retained its normal phase. Results confirm that negative air ions are biologically active and that they do affect the body's circadian rhythmicity.
在男性受试者（n = 8）休息时以及在自行车测力计上进行的两次连续运动（功率分别为90瓦和180瓦，每次20分钟）期间，研究了空气负离子对直肠温度（Tr）、心率（HR）、摄氧量（VO2）和通气量（VE）的影响。采用交叉设计，在实验和对照条件下，于一天中的4个不同时间点（01:30、10:00、14:00和18:00）对受试者进行暴露。结果表明，空气负离子显著降低了所有生理变量的静息值（p在0.05至0.01之间）：在运动条件下，这些影响往往会消失，但Tr除外。空气负离子对运动前或运动后的状态焦虑或用力感知没有显著影响（p > 0.05）。尽管Tr保留了其正常相位，但通过空气电离，其显著的昼夜节律振幅减小。结果证实，空气负离子具有生物活性，并且确实会影响人体的昼夜节律。
