ORCID Profile
0000-0001-8398-2406
Current Organisations
Consejo Nacional de Ciencia y Tecnología e Innovación Tecnológica
,
Universidad Peruana Cayetano Heredia
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Publisher: Oxford University Press (OUP)
Date: 09-2015
DOI: 10.5665/SLEEP.4988
Publisher: Mary Ann Liebert Inc
Date: 03-2015
Publisher: BMJ
Date: 23-12-2015
Publisher: Ubiquity Press, Ltd.
Date: 03-2015
Publisher: Elsevier BV
Date: 11-2014
Publisher: BMJ
Date: 23-01-2017
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 12-2005
DOI: 10.1249/01.MSS.0000179901.19280.85
Abstract: Both training and chronic hypoxia act on the autonomic nervous system. Because trained Andean high-altitude natives could perform a high-altitude marathon (4220 m above sea level) in 02:27:23 h, we hypothesized that living in chronic hypoxia does not limit the training-induced benefits on the autonomic modulation of the heart. Trained (N=13) and sedentary (N=11) Andean high-altitude natives performed an active orthostatic test. Eight of the trained subjects repeated the test 6-8 and 20-24 h after the end of a high-altitude marathon. Resting heart rate (HR) and the autonomic modulation of the heart were assessed by time domain and spectral analysis of HR variability (HRV): sympathetic (RR low frequency (LF)) and parasympathetic (RR high frequency (HF)) modulations, and sympathovagal balance (RR-LF:HF ratio). Trained subjects exhibited a higher total power of HRV and a lower resting HR (+30%, P<0.005) than sedentary subjects secondary to a higher and dominant parasympathetic modulation on sympathetic activity (RR-HF, RR-LF:HF ratio). At 6-8 h after the marathon, total power of HRV decreased (-69%), whereas resting HR increased from basal level (+22%), mainly because of a rise in sympathetic modulation (RR-LF, RR-LF:HF ratio). From 8 to 24 h of recovery, sympathetic modulation fell (RR-LF, RR-LF:HF ratio) and all HRV parameters were restored. Responses to the active standing position did not change between each recording session. Living in chronic hypoxia does not limit the training-induced benefits on the autonomic control of the cardiovascular system in Andean high-altitude natives. The sympathetic predominance on the heart observed 6-8 h after the high-altitude marathon disappeared after 1 d of recovery. Therefore, living at high altitude does not impair the autonomic response to training.
Publisher: Human Kinetics
Date: 06-2016
Abstract: Physical inactivity and sedentary behaviors have been linked with impaired health outcomes. Establishing the physical inactivity profiles of a given population is needed to establish program targets and to contribute to international monitoring efforts. We report the prevalence of, and explore sociodemographical and built environment factors associated with physical inactivity in 4 resource-limited settings in Peru: rural Puno, urban Puno, P as de San Juan de Miraflores (urban), and Tumbes (semiurban). Cross-sectional analysis of the CRONICAS Cohort Study’s baseline assessment. Outcomes of interest were physical inactivity of leisure time ( MET-min/week) and transport-related physical activity (not reporting walking or cycling trips) domains of the IPAQ, as well as watching TV, as a proxy of sedentarism (≥2 hours per day). Exposures included demographic factors and perceptions about neighborhood’s safety. Associations were explored using Poisson regression models with robust standard errors. Prevalence ratios (PR) and 95% confidence intervals (95% CI) are presented. Data from 3593 in iduals were included: 48.5% males, mean age 55.1 (SD: 12.7) years. Physical inactivity was present at rates of 93.7% (95% CI 93.0%–94.5%) and 9.3% (95% CI 8.3%–10.2%) within the leisure time and transport domains, respectively. In addition, 41.7% (95% CI 40.1%–43.3%) of participants reported watching TV for more than 2 hours per day. Rates varied according to study settings ( P .001). In multivariable analysis, being from rural settings was associated with 3% higher prevalence of leisure time physical inactivity relative to highly urban Lima. The pattern was different for transport-related physical inactivity: both Puno sites had around 75% to 50% lower prevalence of physical inactivity. Too much traffic was associated with higher levels of transport-related physical inactivity (PR = 1.24 95% CI 1.01–1.54). Our study showed high levels of inactivity and marked contrasting patterns by rural/urban sites. These findings highlight the need to generate synergies to expand nationwide physical activity surveillance systems.
Publisher: Public Library of Science (PLoS)
Date: 23-11-2015
Publisher: Wiley
Date: 07-04-2015
DOI: 10.1111/DME.12752
Publisher: Mary Ann Liebert Inc
Date: 06-2015
Publisher: Springer Science and Business Media LLC
Date: 02-2014
Publisher: BMJ
Date: 2012
Publisher: BMJ
Date: 06-08-2015
Publisher: Elsevier BV
Date: 02-2016
Location: Peru
No related grants have been discovered for Fabiola León-Velarde Servetto.