Effects of negative air ions to

负离子在森林、温泉和瀑布附近被检测到。负离子对人体主观感觉、舒适度、疲劳度和工作效率的改善作用已有许多报道，但其作用机制尚未见报道。为探讨空气负离子对人体的生理效应，在人工气候室（25 ℃，湿度50%）内，将健康青年志愿者暴露于负离子浓度大于10,000个/cc的空气中，观察其与不暴露于负离子浓度的空气中时，体内激素和免疫功能的变化。运动负荷逐渐增加至20 W/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（白色血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检验进行统计学分析。最大耗氧量和VT（v）耗氧量无统计学差异 关于我们 吸气阈值）点。空气负离子可降低运动后15 min的激素应激反应和多巴胺水平（P<0.05），降低最大运动量时的丙酮酸和乳酸水平（P<0.05）。另一项研究是对17名健康男大学生进行富负离子空气和对照空气的双盲暴露。采用视觉模拟评分法（VAS）和手掌局部出汗（SKD 2000，Skinos Co.）有精神压力（计算等）空气负离子组VAS评分降低22.2%（SE 3.3%），对照组VAS评分降低31.8%（SE 5.6%）。这些数据支持了许多综述，认为负离子能提高人体代谢效率和交感神经功能。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