Content area

Abstract

Skin blood flow (SkBF) and endothelial-dependent vasodilatation decline with ageing and can be reversed with exercise training. We tested whether 48 weeks of training could improve SkBF and endothelial function in post-menopausal females; 20 post-menopausal subjects completed the study. SkBF was measured by laser-Doppler flowmetry (LDF). Cutaneous vascular conductance (CVC) was calculated as LDF/blood pressure. Resting CVC was measured at 32°C and peak CVC at 42°C. Cutaneous endothelial-dependent and -independent vasodilatations were determined by the iontophoresis of acetylcholine (ACh) and sodium nitroprusside (SNP), respectively. All assessments described were performed at entry (week 0), and after 6, 12, 24, 36, and 48 weeks of training. Resting CVC measures did not change (P > 0.05) throughout the study. Peak CVC increased (P < 0.05) after 24 weeks (7.2 ± 1.2 vs. 11.6 ± 1.4 AU mmHg^sup -1^) and at the 36- and 48-week assessments (13.0 ± 1.7 and 14.9 ± 2.1 AU mmHg^sup -1^, respectively). Responses to ACh also increased (P < 0.05) at the 24-week assessment (5.1 ± 2.1 vs. 8.55 ± 2.3 AU mmHg^sup -1^) and increased further at the 36 and 48-week assessments (11.6 ± 3.7 and 13.2 ± 3.9 AU mmHg^sup -1^, respectively). Cutaneous responses to SNP increased (P < 0.05) after 36 weeks (8.7 ± 2.1 vs. 13.02 ± 2.23 AU mmHg^sup -1^ at 36 weeks). VO^sub 2max^ increased after 12 weeks (23.5 ± 0.7 vs. 25.4 ± 0.9 ml kg^sup -1^ min^sup -1^) and improved (P < 0.05) further throughout the study (31.6 ± 1.8 ml kg^sup -1^ min^sup -1^ at week 48). Aerobic exercise produces positive adaptations in the cutaneous vasodilator function to local heating as well as in cutaneous endothelial and endothelial-independent vasodilator mechanisms. Aerobic capacity was also significantly improved. These adaptations were further enhanced with progressive increases in exercise intensity.[PUBLICATION ABSTRACT]

Details

Subject
Title
The effect of 48 weeks of aerobic exercise training on cutaneous vasodilator function in post-menopausal females
Publication title
Volume
108
Issue
6
Pages
1259-67
Publication year
2010
Publication date
Apr 2010
Publisher
Springer Nature B.V.
Place of publication
Heidelberg
Country of publication
Netherlands
ISSN
14396319
e-ISSN
14396327
Source type
Scholarly Journal
Language of publication
English
Document type
Journal Article
Accession number
20039056
ProQuest document ID
203293071
Document URL
https://www.proquest.com/scholarly-journals/effect-48-weeks-aerobic-exercise-training-on/docview/203293071/se-2?accountid=208611
Copyright
Springer-Verlag 2010
Last updated
2024-08-27
Database
ProQuest One Academic