Journal
LIFE SCIENCES
Volume 151, Issue -, Pages 323-329Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.lfs.2016.02.091
Keywords
L-Arginine; Nitric oxide; Menopause; Aerobic exercise
Funding
- Sao Paulo Research Foundation - FAPESP [2009/17751-3]
- [FAPESP: 2011/11457-6]
Ask authors/readers for more resources
After menopause the incidence of cardiovascular diseases increases in women. A decrease in nitric oxide (NO) bioavailability has been pointed out to play a major role in this phenomenon. Since it is believed that L-arginine administration could improve NO bioavailability, the aim of this study was to examine the effects of acute L-arginine administration associated with aerobic exercise on blood pressure (BP), redox state and inflammatory biomarkers in normotensive postmenopausal women (NPW). Sixteen volunteers (57 +/- 6 yr) were subjected to four experimental sessions (crossover design): arginine + exercise (A-E); arginine (ARG); exercise + placebo (EXE); control (CON). Each session was initiated with either 9 g of L-arginine ingestion (ARG or A-E days), placebo (EXE day), or nothing (CON day). The participants performed 30 min of aerobic exercise (A-E and EXE days) or sitting rest (CON and ARG days). Blood samples were collected before each session and 45 min after the intervention. Office BP and ambulatory blood pressure monitoring (ABPM) were evaluated. NO/cGMP pathway, redox state and inflammatory biomarkers were measured. Systolic BP decreased during the 24-hour in A-E and EXE sessions. However, diastolic BP reduced only in A-E session. No changes were found in the biomarkers concentrations. In conclusion, the association was effective in lowering diastolic BP in NPW. Additionally, physical exercise alone promoted a long lasting effect on systolic BP measured by ABPM in this population, although this beneficial effect was not associated with changes in the cardio-inflammatory biomarkers. Possibly, other factors such as neural influences could be mediating this effect. (C) 2016 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available