Effects of negative air ions to

在森林、温泉和瀑布附近都能检测到负离子。目前已经有很多报道称负离子可以改善主观感觉、舒适度、疲劳度和工作效率，但关于其机制的证据还很少报道。为了探讨空气负离子对人体的生理影响，我们分析了人体激素和免疫系统的变化。在人工气候室内（25℃，50%湿度），年轻健康志愿者双盲暴露于富负离子空气（bbb10万计数/毫升：由电离设备产生）或不暴露于富负离子空气中。他们安装因此计量运动（逐渐增加20W/min）。我们测试了激素（肾上腺素、去甲肾上腺素、多巴胺、皮质醇和血清素）、免疫应激反应（白细胞和淋巴细胞亚群）和代谢产物（丙酮酸和乳酸）。采用配对t检验进行统计分析。两组最大耗氧量、VT （v…More ventilation threshold）点数无统计学差异。负空气离子降低激素应激反应，运动后15 min多巴胺水平降低（p<0.05），最大运动时丙酮酸和乳酸水平降低（p<0.05）。空气负离子降低免疫应激反应（白细胞总数、NK亚群）。在另一项测试中，17名健康男学生被双盲暴露在富含负离子的空气和对照空气中。采用视觉模拟量表（VAS）、手掌局部汗液（SKD2000， Skinos公司）、精神压力（计算等）测试和中医针刺刺激10分钟进行分析。空气负离子显著降低VAS；空气负离子组占22.2%(SE 3.3%)，对照组占31.8%（SE5.6%）。空气中的负离子显著减少了局部出汗。这些数据支持了许多综述，并提示负离子改善了人体和交感神经功能的代谢效率。所以我们需要离子效应的进一步证据。少

Negative ions are detected in forests, at spas, and near waterfalls. Many reports have been published that the negative ions improve the subjective feeling, comfort, fatigue and occupational efficiency, but few evidence of the mechanism have been reported yet. To investigate the physiological effect of negative air ion for humans, we analyzed the hormonal and immunological changes.In the artificiall climate room (25 degree centigrate, 50% humidity), young healthy volunteer were double-blindly exposed in negative-ion rich air (>10,000counts/cc : produced by ionizer equipment) or not. They were installed ergo metric exercise (gradually increased 20W/min). We tested hormonal (adrenalin, noradrenalin, dopamine, cortisol and serotonin), immunological stress responses (white blood cell and lymphocyte subsets) and metabolic products (pyrubic acids and lactic acids). Paired t-test was used for statistical analysis. There were no statistical differences in O2 consumption of maximum and of VT (v … More entilatory threshold) points. Negative air ions decreased the hormonal stress response and decreased dopamine level at 15 min after exercise (p<0.05) and diminished the pyrubic acid and lactic acid at the max exercise (p<0.05). And negative air ions diminished the immunological stress response (total white blood cells, NK subsets).In another examination, 17 healthy male students were double-blindly exposed both negative ion rich air and control air. They were analyzed visual analogue scale (VAS) and local perspiration of palm (SKD2000, Skinos Co.) with mental stress (calculation etc.) test and 10 minutes pinprick stimulation by Chinese medical doctor.Negative air ions significantly reduced VAS ; 22.2%(SE 3.3%) in negative air ions and 31.8%(SE5.6%) in control. And negative air ions significantly reduced local perspiration.These dataa supported many reviews and suggested that the negative ions improved the metabolic efficiency of human and sympathetic nerve function. So we would need the further evidence of the ions effects. Less