Effect of number of hours and days of accelerometer use on physical activity estimates in adolescents

Abstract The study analyzed the effect of number of hours and days of accelerometer use on estimates of physical activity (PA) time in adolescents. Cross-sectional study of 784 adolescents from 10 to 14 years old (53.9% girls). Overlapping 95% confidence intervals (95%CI) were used to compare mean light (LPA), moderate (MPA), vigorous (VPA) and moderate to vigorous (MVPA) physical activity times and prevalence of sufficient PA levels between different numbers of hours ( ≥ 6, ≥ 8 and ≥ 10 hours/day) and days ( ≥ 3, ≥ 4, ≥ 5 and 7 days of use). The criterions of ≥ 6 hours/day with ≥ 3, ≥ 4, ≥ 5 e 7 days and ≥ 8 hour/day with ≥ 3, ≥ 4 e ≥ 5 days of accelerometer use underestimated, in average, the LPA time in 23.1 and 12.6 min/day, respectively, compared ≥ 10 hours/day. There were no significant differences in mean MPA, VPA and MVPA times and prevalence of sufficient PA levels between the number of hours and days of use analyzed. To produce accurate estimates of PA time in teenagers, ≥ 3 days of accelerometer use was adopted for ≥ 10 hours/day of LPA and ≥ 6 hours/day of MPA, VPA and MVPA.Resumo Objetivou-se analisar o efeito da quantidade de horas e dias de uso do aceler ômetro sobre as estimativas de tempo de atividade física (AF) em adolescentes. Estudo transversal com 784 adolescentes de 10 a 14 anos de idade (53,9% do sexo feminino). Os tempos médios de atividade física leve (AFL), moderada (AF...
Source: Revista Brasileira de Cineantropometria e Desempenho Humano - Category: Sports Medicine Source Type: research

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Authors: Stefano GB, Esch T, Kream RM Abstract The relaxation response derives its health benefits by reestablishing "normal" equilibria between the sympathetic and parasympathetic branches of the autonomic nervous system. Recent work suggests that this behavioral training provides positive effects on mitochondrial bioenergetics, insulin secretion, and reductions in pro-inflammatory and stress-related pathways. We have previously contended, however, that correlative associations of relaxation training with positive changes in gene expression in selected biological systems are strongly suggestive of adapti...
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
Authors: Xu J, Wang X, Xiao H, Xu J Abstract BACKGROUND To determine the difference in size-specific dose estimates (SSDEs), separately based on effective diameter (deff) and water equivalent diameter (dw) of the central slice of the scan range in computed tomography coronary angiography (CTCA). MATERIAL AND METHODS There were 134 patients who underwent CTCA examination, were electronically retrieved. SSDEs (SSDEdeff and SSDEdw) were calculated using 2 approaches: deff and dw. The median SSDEs and mean absolute relative difference of SSDEs were calculated. Linear regression model was used to assess the absolute rel...
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
Resveratrol Protects the Myocardium in Sepsis by Activating the Phosphatidylinositol 3-Kinases (PI3K)/AKT/Mammalian Target of Rapamycin (mTOR) Pathway and Inhibiting the Nuclear Factor-κB (NF-κB) Signaling Pathway. Med Sci Monit. 2019 Dec 06;25:9290-9298 Authors: Shang X, Lin K, Yu R, Zhu P, Zhang Y, Wang L, Xu J, Chen K Abstract BACKGROUND Sepsis combined with myocardial injury is an important cause of septic shock and multiple organ failure. However, the molecular mechanism of sepsis-induced myocardial dysfunction has not yet been thoroughly studied. Resveratrol has been an important rese...
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
Authors: Pountney M PMID: 31809596 [PubMed - in process]
Source: Medicine, Conflict and Survival - Category: International Medicine & Public Health Tags: Med Confl Surviv Source Type: research
Authors: Birch M, van Bergen L PMID: 31809595 [PubMed - in process]
Source: Medicine, Conflict and Survival - Category: International Medicine & Public Health Tags: Med Confl Surviv Source Type: research
This study assessed the prevalence, risk factors, and co-infectivity of CTBP such as piroplasms, rickettsiae, Coxiella burnetii, hepatozoa, hemotropic mycoplasmas, and Borrelia spp., using PCR and phylogenetic analyses. Of the 510 dogs tested, three CTBP, including Anaplasma phagocytophilum 16S rRNA (13; 2.6%), Hepatozoon canis 18S rRNA (2; 0.4%), and Mycoplasma haemocanis 16S rRNA (1; 0.2%) were detected. PCR adapted to amplify A. phagocytophilum msp2 and groEL genes generated amplicons thereof in two out of 13 positive dogs. One shelter dog was co-infected with A. phagocytophilum and M. haemocanis. However, Ehrlichia spp...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Publication date: Available online 6 December 2019Source: Ticks and Tick-borne DiseasesAuthor(s): Hein Sprong, Sander Moonen, Sipke E. van Wieren, Tim R. HofmeesterAbstractCattle grazing has been suggested to reduce the risk for Lyme borreliosis by decreasing the density of questing Ixodes ricinus infected with Borrelia burgdorferi sensu lato. We tested the hypotheses that cattle grazing used in woodland management decreases the density of questing I. ricinus, and that it decreases the nympal infection prevalence of B. burgdorferi sensu lato. We further expected the nympal infection prevalence of tick-borne pathogens that ...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Publication date: Available online 6 December 2019Source: Ticks and Tick-borne DiseasesAuthor(s): Amber M. Frye, Thomas M. Hart, Danielle M. Tufts, Sanjay Ram, Maria A. Diuk-Wasser, Peter Kraiczy, Anna M. Blom, Yi-Pin LinAbstractComplement is a key first line innate host defense system in the blood of vertebrates. Upon activation, this powerful defense mechanism can elicit inflammatory responses, lyse non-self-cells, or mark them for opsonophagocytic removal. Blood-feeding arthropods thus require the ability to block host complement activation in the bloodmeal to prevent undesired cell or tissue damage during feeding. The ...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
"TAVI: Valve in Valve. A new field for structuralists? Literature review". Hellenic J Cardiol. 2019 Dec 03;: Authors: Vrachatis DA, Vavuranakis M, Tsoukala S, Sotiria G, Papaioannou TG, Siasos G, Deftereos G, Giannopoulos G, Raisakis K, Tousoulis D, Deftereos S, Vavuranakis M Abstract Transcatheter aortic valve implantation (TAVI) literally founded the structural heart interventions subspecialty and created an emerging journey of clinical and technical issues. Soon after TAVI introduction into clinical practice, boundaries were expanded with utilization of valve-in-valve (V-i-V) techniques. V...
Source: Hellenic Journal of Cardiology - Category: Cardiology Tags: Hellenic J Cardiol Source Type: research
Transparent substrates introduce challenges in optical metrology, recording, and microscopy. Backside reflections reduce signal to noise, ...
Source: Optics Letters - Category: Physics Authors: Source Type: research
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