535 research outputs found
Efecto agudo hipotensivo de la combinación de ejercicios basados en caminar y de resistencia en mujeres mayores de 65 años no institucionalizadas
Under a Creative Commons license.[EN]: [Objective]: The aim of this study was to test the effects on blood pressure of a single bout of low-intensity resistance exercise combined with moderate aerobic walk-based exercise performed by active, controlled hypertensive elderly women.
[Method]: Forty-two participants were randomized in two types of sessions: exercise session (n = 21), that performed a single bout of combined exercise and control session (n = 21) that keep in rest during the bout. Pre-session, post-session and post-24-hour systolic, diastolic and mean pressure values were evaluated and compared between groups.
[Results]: Statistical significant reductions were achieved just after the performed bout (7% of reduction) and 24 hours after the bout (9% of reduction) on the diastolic blood pressure values in the exercise session group.
[Conclusions]: In this population, a single bout of combined session is feasible and safe and has a hypotensive effect on diastolic blood pressure in both immediately and after 24 hours post exercise.[ES]: [Objetivo]: Comprobar el efecto hipotensivo que una sola sesión de ejercicio combinado puede tener sobre la presión arterial de mujeres hipertensas controladas y mayores de 65 años. [Método]: Cuarenta y dos participantes fueron asignadas aleatoriamente a dos grupos de sesiones: sesión de entrenamiento (n = 21) que realizó una sola sesión de ejercicios combinados y sesión control (n = 21) que mantuvo reposo durante la misma. Antes, después y tras 24 horas desde la sesión, los valores de presión sistólica, diastólica y medios fueron evaluados y comparados entre grupos. [Resultados]: Se encontraron diferencias estadísticamente significativas entre los grupos tras la realización de la sesión (7% de reducción) y tras 24 horas (9% de reducción) en los valores de presión arterial diastólica media del grupo experimental.
[Conclusiones]: En esta población una sola sesión de ejercicio combinado se propone como aplicable y segura y tiene un efecto hipotensivo en la presión diastólica tanto inmediatamente después como pasadas 24 horas de la intervención.The present study was supported by grants from the Government of Andalusia. Andalusia Center for Development Biology provided human and infrastructure resources. Jesús del Pozo-Cruz was awarded a predoctoral fellowship funded by the proyect IMD2010-SC002 from the Andalusia Center of Sport Medicine on behalf of the Government of Andalusia.Open Access funded by Consejería de Educación, Cultura y Deporte de la Junta de Andalucía.Peer Reviewe
Usos y beneficios de la historia oral
La historia oral es una metodología propia de las Ciencias Sociales, aunque puede extenderse mucho más allá de ellas. Supone una metodología de investigación rica en el aprendizaje y conocimiento de diversos sucesos, acciones, procesos y circunstancias pasadas, y que son relatadas y recogidas a través de la voz, en primera persona, de un sujeto o grupo de ellos.Proyecto de Innovación Docente ReiDoCrea. Departamento de Psicología Social. Universidad de Granada
Muscle Physiology Changes Induced by Every Other Day Feeding and Endurance Exercise in Mice: Effects on Physical Performance
Every other day feeding (EOD) and exercise induce changes in cell metabolism. The aim of the present work was to know if both EOD and exercise produce similar effects on physical capacity, studying their physiological, biochemical and metabolic effects on muscle. Male OF-1 mice were fed either ad libitum (AL) or under EOD. After 18 weeks under EOD, animals were also trained by using a treadmill for another 6 weeks and then analyzed for physical activity. Both, EOD and endurance exercise increased the resistance of animals to extenuating activity and improved motor coordination. Among the groups that showed the highest performance, AL and EOD trained animals, ALT and EODT respectively, only the EODT group was able to increase glucose and triglycerides levels in plasma after extenuating exercise. No high effects on mitochondrial respiratory chain activities or protein levels neither on coenzyme Q levels were found in gastrocnemius muscle. However, exercise and EOD did increase β-oxidation activity in this muscle accompanied by increased CD36 levels in animals fed under EOD and by changes in shape and localization of mitochondria in muscle fibers. Furthermore, EOD and training decreased muscle damage after strenuous exercise. EOD also reduced the levels of lipid peroxidation in muscle. Our results indicate that EOD improves muscle performance and resistance by increasing lipid catabolism in muscle mitochondria at the same time that prevents lipid peroxidation and muscle damage
Highlights from the Pierre Auger Observatory
The Pierre Auger Observatory is the world's largest cosmic ray observatory.
Our current exposure reaches nearly 40,000 km str and provides us with an
unprecedented quality data set. The performance and stability of the detectors
and their enhancements are described. Data analyses have led to a number of
major breakthroughs. Among these we discuss the energy spectrum and the
searches for large-scale anisotropies. We present analyses of our X
data and show how it can be interpreted in terms of mass composition. We also
describe some new analyses that extract mass sensitive parameters from the 100%
duty cycle SD data. A coherent interpretation of all these recent results opens
new directions. The consequences regarding the cosmic ray composition and the
properties of UHECR sources are briefly discussed.Comment: 9 pages, 12 figures, talk given at the 33rd International Cosmic Ray
Conference, Rio de Janeiro 201
A search for point sources of EeV photons
Measurements of air showers made using the hybrid technique developed with
the fluorescence and surface detectors of the Pierre Auger Observatory allow a
sensitive search for point sources of EeV photons anywhere in the exposed sky.
A multivariate analysis reduces the background of hadronic cosmic rays. The
search is sensitive to a declination band from -85{\deg} to +20{\deg}, in an
energy range from 10^17.3 eV to 10^18.5 eV. No photon point source has been
detected. An upper limit on the photon flux has been derived for every
direction. The mean value of the energy flux limit that results from this,
assuming a photon spectral index of -2, is 0.06 eV cm^-2 s^-1, and no celestial
direction exceeds 0.25 eV cm^-2 s^-1. These upper limits constrain scenarios in
which EeV cosmic ray protons are emitted by non-transient sources in the
Galaxy.Comment: 28 pages, 10 figures, accepted for publication in The Astrophysical
Journa
Reconstruction of inclined air showers detected with the Pierre Auger Observatory
We describe the method devised to reconstruct inclined cosmic-ray air showers
with zenith angles greater than detected with the surface array of
the Pierre Auger Observatory. The measured signals at the ground level are
fitted to muon density distributions predicted with atmospheric cascade models
to obtain the relative shower size as an overall normalization parameter. The
method is evaluated using simulated showers to test its performance. The energy
of the cosmic rays is calibrated using a sub-sample of events reconstructed
with both the fluorescence and surface array techniques. The reconstruction
method described here provides the basis of complementary analyses including an
independent measurement of the energy spectrum of ultra-high energy cosmic rays
using very inclined events collected by the Pierre Auger Observatory.Comment: 27 pages, 19 figures, accepted for publication in Journal of
Cosmology and Astroparticle Physics (JCAP
The Pierre Auger Observatory III: Other Astrophysical Observations
Astrophysical observations of ultra-high-energy cosmic rays with the Pierre
Auger ObservatoryComment: Contributions to the 32nd International Cosmic Ray Conference,
Beijing, China, August 201
Measurement of the Depth of Maximum of Extensive Air Showers above 10^18 eV
We describe the measurement of the depth of maximum, Xmax, of the
longitudinal development of air showers induced by cosmic rays. Almost four
thousand events above 10^18 eV observed by the fluorescence detector of the
Pierre Auger Observatory in coincidence with at least one surface detector
station are selected for the analysis. The average shower maximum was found to
evolve with energy at a rate of (106 +35/-21) g/cm^2/decade below 10^(18.24 +/-
0.05) eV and (24 +/- 3) g/cm^2/decade above this energy. The measured
shower-to-shower fluctuations decrease from about 55 to 26 g/cm^2. The
interpretation of these results in terms of the cosmic ray mass composition is
briefly discussed.Comment: Accepted for publication by PR
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