Universidade de Pernambuco

About: Universidade de Pernambuco is a education organization based out in Recife, Brazil. It is known for research contribution in the topics: Population & Medicine. The organization has 6147 authors who have published 6948 publications receiving 73648 citations.

A análise de conteúdo como forma de tratamento dos dados numa pesquisa qualitativa em educação física escolar

Abstract: Muitas vezes, em livros e periodicos, se da menor enfase a elucidacao da metodologia investigativa, favorecendo o nao reconhecimento dos procedimentos e instrumentos de coleta e analise dos dados como construto da elaboracao do pesquisador. Neste artigo, apresentamos uma reflexao acerca de uma das fases da metodologia cientifica, focalizando a analise de conteudo categorial tematica como uma das formas de tratamento dos dados. Tomamos como exemplo, para discutir e fundamentar o ato de pesquisa, uma investigacao desenvolvida no âmbito da Educacao Fisica escolar, na intencao de colaborarmos na consolidacao da rigorosidade cientifica das pesquisas nessa area .

Acute effect of resistance exercise intensity in cardiac autonomic modulation after exercise.

Abstract: Background: Cardiac sympathovagal balance is altered after resistance exercise. However, the impact of the characteristics of resistance training in this response remains unclear.Objective: Analyze the acute effect of resistance exercise intensity for trunk and upper limbs in cardiac autonomic modulation after exercise.Methods: Fifteen young men performed three experimental sessions in random order: control (C), resistance exercise with 50% of 1-RM (E50%) and resistance exercise with 70% of 1-RM (E70%). The sessions included 05 exercises for the trunk and upper limbs performed in three sets of 12, 9 and 6 repetitions, respectively. Before and at 20 and 50 minutes after the interventions, the heart rate was measured for spectral analysis of variability.Results: In comparison to the values before the intervention, the RR interval and the band of high frequency (HF) increased (major changes: + 112 ± 83 ms; +10 ± 11 un, respectively, p 0.05). Compared to pre-exercise values, the RR interval and the HF band decreased (major changes: -69 ± 105 ms; -13 ± 14 un, respectively, p < 0.01), while the LF band and the LF/HF ratio increased (major changes: -13 ± 14 un, 13 ± 3 14 ± 3 and un, respectively, p < 0.01) after E70%.Conclusion: The higher intensity of resistance exercise for trunk and upper limbs promoted, in an acute manner, greater increase in cardiac sympathovagal balance after exercise. (Arq Bras Cardiol. 2011; [online].ahead print, PP.0-0)Keywords: Exercise; physical exertion; autonomic nervous system; sympathetic nervous system.

Contributions of mean and shape of blood pressure distribution to worldwide trends and variations in raised blood pressure: a pooled analysis of 1018 population-based measurement studies with 88.6 million participants

Abstract: Background: Change in the prevalence of raised blood pressure could be due to both shifts in the entire distribution of blood pressure (representing the combined effects of public health interventions and secular trends) and changes in its high-blood-pressure tail (representing successful clinical interventions to control blood pressure in the hypertensive population). Our aim was to quantify the contributions of these two phenomena to the worldwide trends in the prevalence of raised blood pressure. Methods: We pooled 1018 population-based studies with blood pressure measurements on 88.6 million participants from 1985 to 2016. We first calculated mean systolic blood pressure (SBP), mean diastolic blood pressure (DBP) and prevalence of raised blood pressure by sex and 10-year age group from 20-29 years to 70-79 years in each study, taking into account complex survey design and survey sample weights, where relevant. We used a linear mixed effect model to quantify the association between (probittransformed) prevalence of raised blood pressure and age-group- and sex-specific mean blood pressure. We calculated the contributions of change in mean SBP and DBP, and of change in the prevalence-mean association, to the change in prevalence of raised blood pressure. Results: In 2005-16, at the same level of population mean SBP and DBP, men and women in South Asia and in Central Asia, the Middle East and North Africa would have the highest prevalence of raised blood pressure, and men and women in the highincome Asia Pacific and high-income Western regions would have the lowest. In most region-sex-age groups where the prevalence of raised blood pressure declined, one half or more of the decline was due to the decline in mean blood pressure. Where prevalence of raised blood pressure has increased, the change was entirely driven by increasing mean blood pressure, offset partly by the change in the prevalence-mean association. Conclusions: Change in mean blood pressure is the main driver of the worldwide change in the prevalence of raised blood pressure, but change in the high-blood-pressure tail of the distribution has also contributed to the change in prevalence, especially in older age groups.

The accuracy of root canal measurements using the Mini Apex Locator and Root ZX-II: an evaluation in vitro

Abstract: Objective The aim of this in vitro study was to compare the capacity of the Root ZX-II and Mini Apex Locator, electronic apex locators (EALS), to prevent overestimated working length. Study design Forty extracted human teeth were used for the study. The cervical portion of each canal was flared using Gates Glidden drills and the teeth were embedded in an alginate model. Canals were irrigated with 2.5% sodium hypochlorite. The actual length (AL) and electronic length (EL) measurements were made on each specimen separately with both devices with the aid of a k-type file. Results The results obtained with each EAL were compared with the corresponding actual length. The statistical analysis of the results showed EAL reliability to prevent overestimated working length to be 100% for the Mini Apex Locator and 97.44% for the Root ZX-II, within a tolerance of ±0.5 mm into account. A paired sample t test showed that there was no statistically significant difference between the accuracy of the devices (P = .5841). Conclusion The results of this study indicate that the Root ZX-II and Mini Apex Locator are accurate devices to prevent overestimated working length.