Search

Your search keyword '"Soares, Pedro P. S."' showing total 7 results
Start Over Author "Soares, Pedro P. S."
7 results on '"Soares, Pedro P. S."'

5. Sex differences in blood pressure regulation during the isometric exercise under heated environment

Author

Padilha, Michelle C. S. V., Ferreira, Felipe C., Oliveira, Thiago L.S., Soares, Pedro Paulo S., and Rodrigues, Gabriel D.

Abstract

In the absence of heat stress, females increase blood pressure (BP) during isometric handgrip exercise due to cardiac output more than total peripheral resistance (TPR) compared to men. Although heat stress seems to blunt BP responses at rest and during handgrip, possible sex differences remained unknown. We hypothesized that BP responses during handgrip under a heated environment (HOT) will be different between men and women. Eight healthy men (29 ± 6 years) and eight women (26 ± 4 years) participated in this study. The experimental protocol was separated into two environmental conditions: HOT (~ 36 °C) and thermoneutral (TC; ~ 24 °C). In both conditions, participants rested for 30 min and performed the handgrip for 3 min. BP, heart rate (HR) stroke volume and cardiac output were continuously recorded, and TPR was calculated (TPR = mean blood pressure (MBP)/cardiac output). HOT reduced BP and TPR at baseline and during handgrip in females as compared to TC, while males showed similar responses in both thermal conditions. HR was higher under HOT in both groups. Cardiac output and stroke volume were not different under HOT compared to TC for females. In males, cardiac output increased at the last minute of handgrip under HOT through augmented HR, because stroke volume was unchanged. In conclusion, the main effect of HOT was to shift downwards BP and total peripheral resistance at rest and during isometric exercise in females. In males, the combination of handgrip and HOT increased cardiac output by augmented HR, whereas BP presented similar responses between thermal conditions during handgrip.

Published
2022
Full Text
View/download PDF

6. Assessment of Vascular Function in HIV-Infected Patients.

Author

Borges, Juliana P., Tibiriçá, Eduardo, Soares, Pedro Paulo S., Benedito, Bruno, Lima, Dirce B., Gomes, Marília B., and Farinatti, Paulo T.V.

Abstract

Purpose: The vascular function in HIV-infected persons under HAART and non-HIV-infected persons was investigated.Method: 18 HIV-positive patients and 23 HIV-negative subjects (14 younger group and 9 older group) were evaluated for microvascular vasodilatation during postocclusive reactive hyperemia (PORH) and during prolonged local thermal hyperemia; overall microvascular flux increase induced by iontophoresis of acetylcholine (ACh) and sodium nitroprusside (SNPDVP); Cutaneous vascular conductance (CVC) responses to ACh were lower in HIV patients compared to both HIV-negative groups (mean [SEM]) (HIV positive: 878.2 [99.5]; older HIV negative: 1129.3 [231.6]; younger HIV negative: 1366.5 [172.6] % baseline). Regarding SNP iontophoresis, HIV-positive and older HIV-negative groups showed lower CVC responses than younger HIV-negative group (HIV positive: 1043.0 [164.6]; older HIV-negative: 980.8 [108.3]; younger HIV-negative: 1757.3 [245.1] % baseline). Vasodilatation induced by thermal hyperemia (HIV positive: 1.63 [0.11]; older HIV negative: 1.48 [0.08]; younger HIV negative: 1.85 [0.27] perfusion units/mm Hg) and PORH (HIV positive: 0.374 [0.025]; older HIV negative: 0.326 [0.025]; younger HIV negative: 0.326 [0.037] PU/mm Hg) were similar between all groups. SIDVP was greater in HIV and older healthy groups than younger healthy group (HIV positive: 9.17 [0.42]; older HIV negative: 8.19 [0.43]; younger HIV negative: 6.42 [0.22] m/s).Conclusion: HIV-infected patients under HAART exhibited slight but nonsignificant lower microvas-cular reactivity to pharmacological stimuli and increased arterial stiffness compared to age-matched HIV-negative subjects. Comparison of both HIV-positive and older HIV-negative groups with younger HIV-negative subjects suggests that age plays a major role in microvascular reactivity regardless the HIV-infection. [ABSTRACT FROM AUTHOR]

Published
2011
Full Text
View/download PDF

7. ACUTE EFFECTS OF STRETCHING EXERCISE ON THE HEART RATE VARIABILITY IN SUBJECTS WITH LOW FLEXIBILITY LEVELS.

Author

FARINATTI, PAULO T.V., BRADÄO, CAROLINA, SOARES, PEDRO P. S., and DUARTE, ANTONIO F. A.

Subjects
STRETCH (Physiology), EXERCISE, HEART beat, PHYSICAL training & conditioning, SPORTS sciences
Abstract

The article presents research on the impact of stretching exercises on the heart rate and heart rate variability of persons with low levels of flexibility Men assessed as having low levels of flexibility performed a series of stretching exercises for the trunk and hamstrings. It was found that parasympathetic activity of heart rate increased after stretching, while sympathetic activity increased during the exercises.

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results