3 0 0 0 OA ビタミンCが一過性の受動喫煙時の動脈機能に及ぼす影響
- 著者
- 東 亜弥子 三浦 哉 石川 みづき
- 出版者
- 一般社団法人日本体力医学会
- 雑誌
- 体力科学 (ISSN:0039906X)
- 巻号頁・発行日
- vol.68, no.2, pp.153-157, 2019-04-01 (Released:2019-03-16)
- 参考文献数
- 31
As well as active smoking, passive smoking is associated with a high risk of developing cardiovascular disease. The antioxidant vitamin C may inhibit the unfavorable effects of passive smoking. In this study, we investigated the effects of vitamin C ingestion on changes in the flow-mediated dilatation (FMD) at the brachial artery in patients exposed to transient passive smoking. The study participants included seven healthy adult males who were examined by high-resolution ultrasonography of the brachial artery before and after 15-minute of passive smoking. FMD was used to examine the endothelial function. Randomized crossover controlled trial, measurements were performed on two different days 120-minute after the oral administration of 1000mg of ascorbic acid (VC trial) or a placebo (P trial). Although the FMD values decreased after passive smoking in both trials, the FMD values of the VC trial were higher than those of the P trial, with significant differences between the trials observed immediately and 30-minute after passive smoking. The results of this study suggested that the ingestion of vitamin C may suppress the decrease in the vascular endothelial function caused by transient passive smoking.
2 0 0 0 OA 一過性の自転車こぎ運動と下肢への電気刺激の併用が動脈スティフネスに及ぼす影響
- 著者
- 西村 里奈 三浦 哉 羅 成圭 田村 靖明 中村 みづき 久我 浩正 出口 純次
- 出版者
- 一般社団法人日本体力医学会
- 雑誌
- 体力科学 (ISSN:0039906X)
- 巻号頁・発行日
- vol.72, no.6, pp.371-380, 2023-12-01 (Released:2023-11-14)
- 参考文献数
- 42
Endurance exercises, such as cycling or running, are useful for reducing arterial stiffness. However, individuals with a low physical fitness level, or patients suffering from leg diseases with pain, are unable to perform such moderate-intensity lower-limb exercises for long periods of time. The aim of this study was to evaluate the effects of acute cycling with Electrical muscle stimulation (EMS) on the brachial to ankle pulse wave velocity (ba-PWV). Ten healthy adult men performed 3 sessions, as follows of 20 min: cycling at 50% VO2max (C), cycling at an intensity of 50%VO2max subtracted from VO2 during EMS (LC), and cycling at the intensity of the LC trial while also being combined with EMS (LC+E). The ba-PWV was measured before and after each exercise. In addition, the femoral artery blood flow (BF) was measured in eight healthy adult men before and after exercise using an ultrasound imaging system. In the C and LC+E trials, the ba-PWV significantly decreased immediately after the exercise session, whereas the ba-PWV did not significantly change following the LC trial in any session. Compared with the baseline, the femoral artery BF values significantly increased after all trials. In the C and LC+E trials, the femoral artery BF was significantly greater than that in the LC trial. Acute endurance low-intensity cycling with EMS results in a reduction in the arterial stiffness which is similar to that with moderate-intensity exercise.