Página 1 dos resultados de 6301 itens digitais encontrados em 0.370 segundos

## Physical measures of the carcass and the chemical composition of Longissimus dorsi muscle of Alentejano pigs between 70 and 110 kg LW.

Neves, J.A.; Freitas, A.B.; Martins, J.M.; Nunes, J.T.
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.85%
The aim of this work was to determine the relationship between physical measures from the subcutaneous tissue and Longissimus dorsi (LD) muscle (area, depth, and width measured between the 3rd and 4th lumbar vertebrae, at the last rib, and between the 3rd and 4th last ribs) and the chemical composition of LD at 70, 80, 90, 100, and 110 kg LW. The content of water, protein, neutral and polar lipids, total and soluble collagen, and total pigments, were determined. Globally, the measures taken and the chemical composition were not affected between 70 and 110 kg, except for the LD depth and width at the 3rd-4th lumbar vertebrae. At 70 kg, the LD depth was greater than at 110 kg (3.77 vs. 2.75 cm, P<0.05) and the width was smaller (8.14 vs. 9.82 cm, P<0.05). In conclusion, from 70 to 110 kg: i) the morphological changes in the lumbar region were due mainly to the width dimension, with no impact on the chemical composition of the muscle; and ii) the chemical composition did not change drastically, even though the amount of intramuscular fat increased slightly between 70 and 110 kg (5.32 and 6.67%, respectively) suggesting an early intramuscular fat deposition.

## Physical measures of the carcass and the chemical composition of Longissimus dorsi muscle of Alentejano pigs between 70 and 110 kg LW.

Neves, J.A.; Freitas, A.; Martins, J.M.; Nunes, J.L.T.
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.85%
The aim of this work was to determine the relationship between physical measures from the subcutaneous tissue and Longissimus dorsi (LD) muscle (area, depth, and width measured between the 3rd and 4th lumbar vertebrae, at the last rib, and between the 3rd and 4th last ribs) and the chemical composition of LD at 70, 80, 90, 100, and 110 kg LW. The content of water, protein, neutral and polar lipids, total and soluble collagen, and total pigments, were determined. Globally, the measures taken and the chemical composition were not affected between 70 and 110 kg, except for the LD depth and width at the 3rd-4th lumbar vertebrae. At 70 kg, the LD depth was greater than at 110 kg (3.77 vs. 2.75 cm, P<0.05) and the width was smaller (8.14 vs. 9.82 cm, P<0.05). In conclusion, from 70 to 110 kg: i) the morphological changes in the lumbar region were due mainly to the width dimension, with no impact on the chemical composition of the muscle; and ii) the chemical composition did not change drastically, even though the amount of intramuscular fat increased slightly between 70 and 110 kg (5.32 and 6.67%, respectively) suggesting an early intramuscular fat deposition.

## Variation of the different attributes that support the physical function in community-dwelling older adults

Pereira, Catarina
Fonte: Journal of Sports Medicine and Physical Fitness; Minerva Medica Publicador: Journal of Sports Medicine and Physical Fitness; Minerva Medica
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.81%
AIM: This study investigated the variation with age of different attributes that support the physical functioning in community-dwelling older adults having as reference scores from young adults. METHODS: The study was a cross-sectional study. Participants were 559 older adults and 79 young adults grouped according to gender and age (Y:20-29, A:60-64, B:65-69, C:70-74, D:75-79 and E:≥80 years). Strength, flexibility, agility, aerobic endurance, and balance were evaluated by Fullerton tests. RESULTS: ANOVA and Bonferroni post-hoc tests showed that compared to young, the 60-64 years group showed decreased values in almost all attributes of physical function. In older adults, additional differences were observed in females mainly between the 60-64 years group and the 70-74 years, 75-79 years, and:≥80 years groups, and in males between the 60-64 years group and the ≥80 years group (P<0.05). Comparisons between standardized physical function attributes (T-scores) done by repeated measures and contrasts demonstrated that, across age groups, agility and dynamic balance showed the highest rate loss in both genders, and lower body flexibility showed the lowest (P<0.01). CONCLUSION: Physical function reduction seems to occur earlier in women than in men and abilities involving multiple structures such as balance...

## Physical activity patterns in adults who are blind as assessed by accelerometry.

Marmeleira, José; Laranjo, Luís; Marques, Olga; Pereira, Catarina
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.75%
The main purpose of our study was to quantify, by using accelerometry, daily physical activity (PA) in adults with visual impairments. Sixty-three adults (34.9% women) who are blind (18-65 years) wore an accelerometer for at least 3 days (minimum of 10 hr per day), including 1 weekend day. Nineteen participants (~30%) reached the recommendation of 30 min per day of PA, when counting every minute of moderate or greater intensity. No one achieved that goal when considering bouts of at least 10 min. No differences were found between genders in PA measures. Chronological age, age of blindness onset, and body mass index were not associated with PA. We conclude that adults who are blind have low levels of PA and are considerably less active compared with the general population. Health promotion strategies should be implemented to increase daily PA for people with visual impairments.

## The Influence of Body Mass Index on Self-report and Performance-based Measures of Physical Function in Adult Women

Hergenroeder, Andrea L; Brach, Jennifer S; Otto, Amy D; Sparto, Patrick J; Jakicic, John M
Fonte: Cardiopulmonary Physical Therapy Journal, Inc. Publicador: Cardiopulmonary Physical Therapy Journal, Inc.
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
36.11%
Purpose: Little is known about limitations in physical function across BMI categories in middle aged women using both self-report and performance-based measures. Furthermore, the impact of BMI on the measurement of function has not been explored. The purpose of this study was to assess physical function in adult women across BMI categories using self-report and performance-based measures and determine the influence of BMI on the relationship between the measures. Methods: Fifty sedentary females (10 in each BMI category: normal weight, overweight, obese class I, II, and III) aged 51.2 ± 5.4 years participated. Assessments included demographics, past medical history, physical activity level, BMI, and self-report (Late Life Function and Disability Instrument) and performance-based measures of physical function (6-Minute Walk Test, timed chair rise, gait speed). Physical function was compared between BMI categories using analysis of variance. The influence of BMI on the relationship of self-report and performance-based measures was analyzed using linear regression. Results: Compared to those that were normal weight or overweight, individuals with obesity scored lower on the self-report measure of physical function (LLFDI) for capability in participating in life tasks and ability to perform discrete functional activities. On the performance-based measures...

## Factors Associated with Performance-based Physical Function of Older Veterans of the PLAAF: A Pilot Study

Chen, Da-Wei; Jin, Yan-Bin; Liu, Wei; Du, Wen-Jin; Li, Hua-Jun; Chen, Jin-Wen; Xu, Wei
Fonte: The Society of Physical Therapy Science Publicador: The Society of Physical Therapy Science
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.8%
[Purpose] This study investigated the factors associated with performance-based physical function of older veterans of the People’s Liberation Army Air Force of China (PLAAF). [Subjects and Methods] A cross-sectional survey of 146 older veterans of the PLAAF was carried out. Their physical function was measured using the Chinese Mini-Physical Performance Testing (CM-PPT). The demographics and health status (including physical measures, blood chemical tests, chronic diseases, and number of morbidities) were collected from health examination reports and computer records of case history. Cognition was measured using the Mini-Mental Status Examination (MMSE). [Results] In multiple linear regressions, age, MMSE, Parkinsonism, and chronic obstructive pulmonary disease were independently associated with CM-PPT, while previous stroke and albumin level reached borderline statistical significance. The association between the number of morbidities and CM-PPT was significant after adjustment for MMSE and demographics. The CM-PPT of low (0 or 1), medium (2 to 4) and high count (5 or more) morbidities were 11.3±3.9, 10.2±4.1, 6.1±3.8 respectively, and the difference among these three groups was significant. [Conclusion] Some modified conditions and the number of chronic diseases might be associated with the physical function of older veterans of the PLAAF.

## Standardized Application of Laxatives and Physical Measures in Neurosurgical Intensive Care Patients Improves Defecation Pattern but Is Not Associated with Lower Intracranial Pressure

Kieninger, Martin; Sinner, Barbara; Graf, Bernhard; Grassold, Astrid; Bele, Sylvia; Seemann, Milena; Künzig, Holger; Zech, Nina
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.85%
Background. Inadequate bowel movements might be associated with an increase in intracranial pressure in neurosurgical patients. In this study we investigated the influence of a structured application of laxatives and physical measures following a strict standard operating procedure (SOP) on bowel movement, intracranial pressure (ICP), and length of hospital stay in patients with a serious acute cerebral disorder. Methods. After the implementation of the SOP patients suffering from a neurosurgical disorder received pharmacological and nonpharmacological measures to improve bowel movements in a standardized manner within the first 5 days after admission to the intensive care unit (ICU) starting on day of admission. We compared mean ICP levels, length of ICU stay, and mechanical ventilation to a historical control group. Results. Patients of the intervention group showed an adequate defecation pattern significantly more often than the patients of the control group. However, this was not associated with lower ICP values, fewer days of mechanical ventilation, or earlier discharge from ICU. Conclusions. The implementation of a SOP for bowel movement increases the frequency of adequate bowel movements in neurosurgical critical care patients. However...

## Using sulcal and gyral measures of brain structure to investigate benefits of an active lifestyle

Lamont, Ashley J; Mortby, Moira E; Anstey, Kaarin J; Sachdev, Perminder S; Cherbuin, Nicolas
Tipo: Artigo de Revista Científica Formato: 7 pages
Português
Relevância na Pesquisa
36.08%
Background: Physical activity is associated with brain and cognitive health in ageing. Higher levels of physical activity are linked to larger cerebral volumes, lower rates of atrophy, better cognitive function and lesser risk of cognitive decline and dementia. Neuroimaging studies have traditionally focused on volumetric brain tissue 17 measures to test associations between factors of interest (e.g. physical activity) and brain structure. However, cortical sulci may provide additional information to these more standard measures. Method: Associations between physical activity, brain structure, and cognition were investigated in a large, community-based sample of cognitively healthy individuals (N = 317) using both sulcal and volumetric measures. Results: Physical activity was associated with narrower width of the Left Superior Frontal Sulcus and the Right Central Sulcus,while volumetric measures showed no association with physical activity. In addition, Left Superior Frontal Sulcal width was associated with processing speed and executive function. Discussion: These findings suggest sulcalmeasuresmay be a sensitive index of physical activity related to cerebral health and cognitive function in healthy older individuals. Further research is required to confirm these findings and to examine how sulcal measures may be most effectively used in neuroimaging.

## An investigation into the variation that exists between the physical performance indicators of hurling players at different levels of participation

Murphy, Andrew
Fonte: University of Limerick Publicador: University of Limerick
Tipo: info:eu-repo/semantics/masterThesis; all_ul_research; ul_published_reviewed; ul_theses_dissertations
Português
Relevância na Pesquisa
36.08%
peer-reviewed; Background: There is a paucity of research profiling the anthropometric measures and physical performance indicators of hurling athletes. Such profiles are essential to optimising the physical preparation structures of hurling athletes. Methods: A battery of tests profiling the anthropometric measures and physical performance indicators of 95 hurling athletes from three different levels of participation, senior elite (n1=34), senior sub- elite (n2=28) & junior elite (n3=33) were evaluated on two separate occasions during the season. Data was collected on all squads describing height, body mass, upper and lower extremity power, sprint performance, local muscular endurance, anaerobic endurance and aerobic endurance. Additional body composition measurements were conducted using DXA on the senior elite team. Results: There was a significant difference (p≤0.05) between measures of body mass, lower extremity power, sprint performance and endurance between senior elite and senior sub elite squads. Significant differences were also present (p≤0.05) between measures of height, body mass, upper and lower extremity power and sprint performance in the senior elite and junior elite squads. The findings also revealed selecte anthropometric measures and physical performance indicators are subject to significant seasonal change (p≤0.05). Conclusion: The results of this research provide normative data for the population of hurling athletes. The results also show that selected anthropometric measures and physical performance indicators illustrate a progressive improvement as level of participation increases. Such measures and indicators are subject to seasonal change but are dependent on the training programme content and initial pre-season levels.

## VALIDITY AND RELIABILITY OF THE INTERNATIONAL PHYSICAL ACTIVITY QUESTIONNAIRE AMONG MEXICAN ADULTS

Medina Garcia, CATALINA
Fonte: Quens University Publicador: Quens University
Português
Relevância na Pesquisa
36.1%
Background: Because it is a strong determinant of chronic disease and mortality risk, physical activity is a health behaviour that is measured in most large health surveys. Questionnaires are the most commonly used method for measuring physical activity in health surveys. In the early 1990’s, an international physical activity questionnaire (IPAQ) was created to allow researchers from across the globe to employ the same questionnaire within their country. Several studies have been conducted on the IPAQ to determine whether the responses obtained are comparable when the questionnaire is administered on multiple occasions (reliability) and to determine the ability of the questionnaire to obtain the same physical activity result when compared to other direct measures, considered as “gold standard” (validity). However, none of these studies have been conducted in Mexico. Objective: Examine: 1) the reliability of the IPAQ among Mexican adults by comparing minutes per week (min/wk) spent in moderate-to-vigorous physical activity (MVPA) from the IPAQ administered two times, 2) the validity of the IPAQ surveys by comparing IPAQ min/wk of MVPA to those obtained by the accelerometer. Methods: 267 Mexican adults who worked in a factory in Mexico City participated. IPAQ was applied in a face-to-face interview during a first clinic visit. Participants received an accelerometer (motion sensor that measures and record physical activity) and wore it consecutively for the next 9 days. In a second visit...

## Physical Measures for Infinitely Renormalizable Lorenz Maps

Martens, Marco; Winckler, Björn
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
45.91%
A physical measure on the attractor of a system describes the statistical behavior of typical orbits. An example occurs in unimodal dynamics. Namely, all infinitely renormalizable unimodal maps have a physical measure. For Lorenz dynamics, even in the simple case of infinitely renormalizable systems, the existence of physical measures is more delicate. In this article we construct examples of infinitely renormalizable Lorenz maps which do not have a physical measure. A priori bounds on the geometry play a crucial role in (unimodal) dynamics. There are infinitely renormalizable Lorenz maps which do not have a priori bounds. This phenomenon is related to the position of the critical point of the consecutive renormalizations. The crucial technical ingredient used to obtain these examples without a physical measure, is the control of the position of these critical points.; Comment: 26 pages, 1 figure

## Physical Measures for Certain Partially Hyperbolic Attractors on 3-Manifolds

Bortolotti, Ricardo T.
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
45.79%
In this work, we study ergodic properties of certain partially hyperbolic attractors whose central direction has a neutral behavior, the main feature is a condition of transversality between unstable leaves when projected by the stable holonomy. We prove that partial hyperbolic attractors satisfying conditions of transversality between unstable leaves via the stable holonomy, neutrality in the central direction and regularity of the stable foliation admits a finite number of physical measures, coinciding with the ergodic u-Gibbs States, whose union of the basins has full Lebesgue measure. Moreover, we describe the construction of a family of robustly nonhyperbolic attractors satisfying these properties.

## On Physical Measures for Cherry Flows

Palmisano, Liviana
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
45.94%
Studies of the physical measures for Cherry flows were initiated by R. Saghin and E. Vargas in "Invariant measures for Cherry flows". While the non-positive divergence case was resolved, the positive divergence one still lacked the complete description. Some conjectures were put forward. In this paper we contribute in this direction. Namely, under mild technical assumptions we solve conjectures stated by R. Saghin and E. Vargas by providing a description of the physical measures for Cherry flows in the positive divergence case.; Comment: arXiv admin note: substantial text overlap with arXiv:1403.7794

## Physical measures for nonlinear random walks on interval

Kleptsyn, Victor; Volk, Denis
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.97%
A one-dimensional confined Nonlinear Random Walk is a tuple of $N$ diffeomorphisms of the unit interval driven by a probabilistic Markov chain. For generic such walks, we obtain a geometric characterization of their ergodic stationary measures and prove that all of them have negative Lyapunov exponents. These measures appear to be probabilistic manifestations of physical measures for certain deterministic dynamical systems. These systems are step skew products over transitive subshifts of finite type (topological Markov chains) with the unit interval fiber. For such skew products, we show there exist only finite collection of alternating attractors and repellers; we also give a sharp upper bound for their number. Each of them is a graph of a continuous map from the base to the fiber defined almost everywhere w.r.t. any ergodic Markov measure in the base. The orbits starting between the adjacent attractor and repeller tend to the attractor as $t \to +\infty$, and to the repeller as $t \to -\infty$. The attractors support ergodic hyperbolic physical measures.; Comment: 29 pages. Corrected a few typos and the title. To appear in Moscow Mathematical Journal

## Physical measures at the boundary of hyperbolic maps

Araujo, Vitor; Tahzibi, Ali
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.9%
We consider diffeomorphisms of a compact manifold with a dominated splitting which is hyperbolic except for a "small" subset of points (Hausdorff dimension smaller than one, e.g. a denumerable subset) and prove the existence of physical measures and their stochastical stability. The physical measures are obtained as zero-noise limits which are shown to satisfy the Entropy Formula.; Comment: 29 pages, 2 figures, 44 references. Minor corrections

## Semicontinuity of entropy, existence of equilibrium states and continuity of physical measures

Araujo, Vitor
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.97%
We obtain some results of existence and continuity of physical measures through equilibrium states and apply these to non-uniformly expanding transformations on compact manifolds with non-flat critical sets, obtaining sufficient conditions for continuity of physical measures and, for local diffeomorphisms, necessary and sufficient conditions for stochastic stability. In particular we show that, under certain conditions, stochastically robust non-uniform expansion implies existence and continuous variation of physical measures.; Comment: 16 pages - Final version

## On the Structure of Physical Measures in Gauge Theories

Fleischhack, Christian
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
45.84%
It is indicated that the definition of physical measures via exponential of minus the action times kinematical measure'' contradicts properties of certain physical models. In particular, theories describing confinement typically cannot be gained this way. The results are rigorous within the Ashtekar approach to gauge field theories.; Comment: 5 pages, LaTeX

## Physical measures for the geodesic flow tangent to a transversally conformal foliation

Alvarez, Sébastien; Yang, Jiagang
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
45.79%
We consider a transversally conformal foliation $\mathcal{F}$ of a closed manifold $M$ endowed with a smooth Riemannian metric whose restriction to each leaf is negatively curved. We prove that it satisfies the following dichotomy. Either there is a transverse holonomy-invariant measure for $\mathcal{F}$, or the foliated geodesic flow admits a finite number of physical measures, which have negative transverse Lyapunov exponents and whose basin cover a set full for the Lebesgue measure. We also give necessary and sufficient conditions for the foliated geodesic flow to be partially hyperbolic in the case where the foliation is transverse to a projective circle bundle over a closed hyperbolic surface.; Comment: 31 pages

## Physical measures for partially hyperbolic surface endomorphisms

Tsujii, Masato
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
45.79%
We consider dynamical systems generated by partially hyperbolic surface endomorphisms of class C^r with one-dimensional strongly unstable subbundle. As the main result, we prove that such a dynamical system generically admits finitely many ergodic physical measures whose union of basins of attraction has total Lebesgue measure, provided that r>= 19.; Comment: 72pages, no figures

## Physical measures of discretizations of generic diffeomorphisms

Guihéneuf, Pierre-Antoine
What is the ergodic behaviour of numerically computed segments of orbits of a diffeomorphism? In this paper, we try to answer this question for a generic conservative $C^1$-diffeomorphism, and segments of orbits of Baire-generic points. The numerical truncation will be modelled by a spatial discretization. Our main result states that the uniform measures on the computed segments of orbits, starting from a generic point, accumulates on the whole set of measures that are invariant under the diffeomorphism. In particular, unlike what could be expected naively, such numerical experiments do not see the physical measures (or more precisely, cannot distinguish physical measures from the other invariant measures).; Comment: 34 pages. The appendices overlap with arXiv:1510.00723