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标题：Plasma free metanephrine and normethanephrine levels correlated to plasma catecholamine after acute running in amateur runner
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作者：Katsuyuki Tokinoya ; Yasuhiro Shishikura ; Nanami Sekine 等
期刊名称：Journal of Exercise Science and Fitness
印刷版ISSN：1728-869X
出版年度：2021
卷号：19
期号：3
页码：178-181
DOI：10.1016/j.jesf.2021.03.002
出版社：Elsevier
摘要：Background Catecholamine is a typical index of exercise intensity, but it is difficult to detect. Plasma metanephrine (MN) and normethanephrine (NMN) levels are more stable than those of catecholamines. This study aimed to investigate plasma MN and NMN levels during acute exercise running in amateur runners. Methods Samples were collected from eight healthy male participants. They were either sedentary or running at low or high intensity for 30 min. Blood samples were collected under these conditions. Measurements taken included plasma adrenaline, noradrenaline, MN, and NMN. Results Plasma adrenaline levels increased after high-intensity exercise compared with sedentary subjects. Plasma noradrenaline, MN, and NMN levels increased after both low- and high-intensity exercise compared with sedentary subjects. In addition, these levels were also significantly higher at high intensity than at low intensity. Plasma adrenaline and noradrenaline levels were positively correlated with plasma free MN and NMN levels after acute running, respectively. Conclusion This study revealed that plasma MN and NMN levels transiently increased depending on exercise intensity in amateur runners. In addition, plasma NMN levels are better markers than plasma MN levels because of their stronger correlation with plasma catecholamine levels.
关键词：Exercise ; Running ; Intensity ; Ventilatory threshold