Motivos de participação dos estudantes universitários em atividades físico-desportivas

El objetivo del presente artículo es contribuir al análisis de los motivos de participación de los estudiantes universitarios en la práctica físico-deportiva. También se pretende establecer diferencias por género y conocer dónde practican deporte los universitarios alicantinos. Para ello, se llevó a cabo una investigación no experimental descriptiva en la que participaron 400 alumnos seleccionados por muestreo no probabilístico por cuotas entre todas las facultades de la Universidad de Alicante, a los que se les aplicó el cuestionario MIAFD (Pavón, 2004). Los resultados indican que la mayoría de la población universitaria practicaba actividades físico-deportivas (58.7%). Los motivos más habituales fueron: para estar en forma (85.9%), para liberar energía (80.8%) y para mejorar la salud (78.3%). En cambio, el principal motivo para no practicar actividad física era la falta de tiempo debido a los estudios. Los hombres afirman en mayor medida que las mujeres practicar actividades físico-deportivas para competir y superarse.The purpose of this paper is to identify the university students’ motives to participate in physical and sports activities. It also aims to determine gender differences and to know where they practice these activities. A non-experimental descriptive study was conducted for this purpose. Four hundred students were selected using a non-probability sampling by quota procedure among all the colleges of the University of Alicante, to whom the MIAFD questionnaire (Pavón, 2004) was administered. Results indicate that most of the university population practiced physical and sport activities (58.7%). The most common reasons for participating in sports were: for fitness (85.9%), to release energy (80.8%) and to improve health (78.3%). On the other hand, the lack of time was the main reason for not practicing physical and sports activities. Competition and self-improvement are motives more frequently adduced by male students than female participants.O objetivo do presente artigo é detectar os motivos dos estudantes universitários em atividades físico-desportivas. Também se pretende estabelecer diferenças por gênero e conhecer onde pratican o desporto os estudantes universitários. Para isso, se levou a cabo uma investigação não experimental descritiva. A amostra utilizada foi de 400 alunos que foram selecionados a través de uma amostragem não probabilística por quotas entre todas as faculdades da Universidade de Alicante e aos quais foi aplicado o questionário MIAFD (Pavón, 2004). Os resultados indicam que a maoria da população universitária praticava atividades físico-desportivas (58.7%). Os motivos mais comuns foram: para estar em forma (85.9%), para a liberação de energia (80.8%) e para melhorar a saúde. No entanto, a principal motivação para não praticar desporto foi a falta de tempo por causa dos estudos. Os homens afirmam que praticam atividades físico-desportivas para competir e para se superar mais frequentemente que as mulheres

Influence of accelerometer signal filtering on automatic detection of gait impact parameters

[EN] Filtering the signal recorded by an accelerometer is essential to remove noise recorded by the sensor, but in order to calculate gait parameters properly, the choice of a suitable cutoff frequency of the filter is critical. This paper evaluates the influence of the filter cutoff frequency in the calculation of the parameters: vertical peak tibial acceleration and acceleration rate. The accelerometer signal filtering with low-pass filter with cutoff frequency below 50 Hz gives good results in the calculation of peak tibial acceleration but produces estimations of the acceleration rate below its real valueThis work has been sponsored by the Generalitat Valenciana: application 09.02.03.542.50.7 budget line T4015 grant from the “Conselleria de Educación, Cultura y Deporte”, aid for conducting R & D for emerging research groups corresponding to the call set out in Annex IX, the Order 64/2014, of July 31, the “Conselleria de Educación, Cultura y Deporte” (DOCV no. 7.332, of August 5, 2014). Record GV /2015/067.Camacho García, A.; Llinares Llopis, R.; Lucas-Cuevas, Á.; Pérez Soriano, P. (2016). Influence of accelerometer signal filtering on automatic detection of gait impact parameters. International Journal of Advancements in Digital Signal Processing. 3(1). http://hdl.handle.net/10251/94462S3

Effects of the exercise in the cerebral blood flow and metabolism. A review

In recent years it has been shown that cerebral blood flow is affected by intense exercise, what may even lead to a reduction in the cognitive capacity. This statement is contrary to the traditional belief that cerebral blood flood remains constant and unaltered even when exercise is performed. During physical exercise of moderate intensity, cerebral blood flow increases in the cerebral areas responsible for movement. Moreover, recent studies have observed that cerebral blood flow decreases during high-intensity exercise as a consequence of a local hyperventilation and vasoconstriction of the areas with lower cerebral activity. Traditionally, the glucose has been considered as the main and unique source of energy for the brain. However, new studies are suggesting that as the intensity of exercise increases, the glucose uptake decreases in favour of an increase in the lactate uptake. Finally, Hyperthermia may also play a major role in the cerebral regulation system, since it can provoke central fatigue as well as hypoglycaemia

The location of the tibial accelerometer does influence impact acceleration parameters during running

Tibial accelerations have been associated with a number of running injuries. However, studies attaching the tibial accelerometer on the proximal section are as numerous as those attaching the accelerometer on the distal section. This study aimed to investigate whether accelerometer location influences acceleration parameters commonly reported in running literature. To fulfil this purpose, 30 athletes ran at 2.22, 2.78 and 3.33 m · s–1 with three accelerometers attached with double-sided tape and tightened to the participants’ tolerance on the forehead, the proximal section of the tibia and the distal section of the tibia. Time-domain (peak acceleration, shock attenuation) and frequency-domain parameters (peak frequency, peak power, signal magnitude and shock attenuation in both the low and high frequency ranges) were calculated for each of the tibial locations. The distal accelerometer registered greater tibial acceleration peak and shock attenuation compared to the proximal accelerometer. With respect to the frequency-domain analysis, the distal accelerometer provided greater values of all the low-frequency parameters, whereas no difference was observed for the high-frequency parameters. These findings suggest that the location of the tibial accelerometer does influence the acceleration signal parameters, and thus, researchers should carefully consider the location they choose to place the accelerometer so that equivalent comparisons across studies can be made. © 2016 Informa UK Limited, trading as Taylor & Francis GroupThis study was supported by the Spanish Government [Ministerio de Educacion, Cultura y Deporte, Grant FPU12/00574; and Ministerio de Economia y Competitividad, Subdireccion General de Proyectos de Investigacion, Convocatoria Proyectos I+D "Excelencia", Subprograma de Generacion de Conocimiento, 2013, Grant DEP2013-48420-P].Lucas Cuevas, ÁG.; Encarnacion Martinez, A.; Camacho García, A.; Llana Belloch, S.; Pérez Soriano, P. (2016). The location of the tibial accelerometer does influence impact acceleration parameters during running. Journal of Sports Sciences. 35(17):1734-1738. https://doi.org/10.1080/02640414.2016.123579217341738351

Modelos de combustibles para arbustales de la Región Andina de las provincias de Río Negro, Chubut y Santa Cruz

En este folleto de divulgación, se dan a conocer las principales herramientas para el modelado de los combustibles vegetales en relación con sus respuestas al fuego.  Está escrito de una manera sencilla para que pueda ser interpretado por jefes de cuadrillas o de brigadas de combatientes de incendios forestales.  En el mismo de describe una metodología común y replicable para la obtención de los llamados "modelos de combustible".   Se dan ejemplos de 6 de estos modelos desarrollados para arbustales del ecotono bosque-estepa de la Patagonia. en base a información científica y empírica.Fil: Rey, Marcelo A.. Provincia de Río Negro. Servicio Provincial de Lucha contra Incendios Forestales; ArgentinaFil: Cuevas, Jorge. Provincia de Río Negro. Servicio Provincial de Lucha contra Incendios Forestales; ArgentinaFil: Sales, Bruno. Provincia de Río Negro. Servicio Provincial de Lucha contra Incendios Forestales; ArgentinaFil: Muñoz, Miriam M.. Provincia de Santa Cruz. Consejo Agrario; ArgentinaFil: Méndez, Mario. Provincia de Santa Cruz. Consejo Agrario; ArgentinaFil: Antequera, Silvio. Provincia de Chubut. Dirección General de Bosques y Parques; ArgentinaFil: Casas, Ángel Leandro. Provincia de Chubut. Dirección General de Bosques y Parques; ArgentinaFil: Lencinas, José Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Provincia del Chubut. Centro de Investigación y Extensión Forestal Andino Patagónico; ArgentinaFil: Mohr Bell, Diego Alejandro. Provincia del Chubut. Centro de Investigación y Extensión Forestal Andino Patagónico; ArgentinaFil: Gómez, Mariano. Provincia del Chubut. Centro de Investigación y Extensión Forestal Andino Patagónico; ArgentinaFil: Defossé, Guillermo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Centro de Investigación y Extensión Forestal Andino Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ingeniería - Sede Esquel. Departamento de Ingeniería Forestal; ArgentinaFil: Bianchi, Lucas Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rodríguez, Norberto. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Díaz, María Cecilia. Plan Nacional de Manejo del Fuego; ArgentinaFil: Dentoni, María del Carmen. Plan Nacional de Manejo del Fuego; ArgentinaFil: Zacconi, Gabriel. Plan Nacional de Manejo del Fuego; Argentin

Modelos de combustibles para arbustales de la Región Andina de las provincias de Río Negro, Chubut y Santa Cruz

En este folleto de divulgación, se dan a conocer las principales herramientas para el modelado de los combustibles vegetales en relación con sus respuestas al fuego.  Está escrito de una manera sencilla para que pueda ser interpretado por jefes de cuadrillas o de brigadas de combatientes de incendios forestales.  En el mismo de describe una metodología común y replicable para la obtención de los llamados "modelos de combustible".   Se dan ejemplos de 6 de estos modelos desarrollados para arbustales del ecotono bosque-estepa de la Patagonia. en base a información científica y empírica.Fil: Rey, Marcelo A.. Provincia de Río Negro. Servicio Provincial de Lucha contra Incendios Forestales; ArgentinaFil: Cuevas, Jorge. Provincia de Río Negro. Servicio Provincial de Lucha contra Incendios Forestales; ArgentinaFil: Sales, Bruno. Provincia de Río Negro. Servicio Provincial de Lucha contra Incendios Forestales; ArgentinaFil: Muñoz, Miriam M.. Provincia de Santa Cruz. Consejo Agrario; ArgentinaFil: Méndez, Mario. Provincia de Santa Cruz. Consejo Agrario; ArgentinaFil: Antequera, Silvio. Provincia de Chubut. Dirección General de Bosques y Parques; ArgentinaFil: Casas, Ángel Leandro. Provincia de Chubut. Dirección General de Bosques y Parques; ArgentinaFil: Lencinas, José Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Provincia del Chubut. Centro de Investigación y Extensión Forestal Andino Patagónico; ArgentinaFil: Mohr Bell, Diego Alejandro. Provincia del Chubut. Centro de Investigación y Extensión Forestal Andino Patagónico; ArgentinaFil: Gómez, Mariano. Provincia del Chubut. Centro de Investigación y Extensión Forestal Andino Patagónico; ArgentinaFil: Defossé, Guillermo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Centro de Investigación y Extensión Forestal Andino Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ingeniería - Sede Esquel. Departamento de Ingeniería Forestal; ArgentinaFil: Bianchi, Lucas Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rodríguez, Norberto. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Díaz, María Cecilia. Plan Nacional de Manejo del Fuego; ArgentinaFil: Dentoni, María del Carmen. Plan Nacional de Manejo del Fuego; ArgentinaFil: Zacconi, Gabriel. Plan Nacional de Manejo del Fuego; Argentin

El desarrollo motor y afectivo en educación física a través del acrosport

El acrosport es un contenido de educación física que se encuentra dentro del bloque de actividades artísticas y expresivas, y goza de unas características especiales que lo convierten en una actividad muy interesante para desarrollar en clase. No solo porque favorece la auto-superación y autoconfianza al enfrentarse a retos motrices relacionados con la ejecución de figuras acrobáticas, sino también porque fomenta la creatividad, la imaginación y la capacidad expresiva, a la vez que desarrolla las habilidades sociales y afectivas del alumnado a la hora de trabajar en equipo, tomando decisiones democráticas y respetando las opiniones de los demás y los diferentes niveles motrices de los compañeros. Es una actividad que nos permite trabajar de manera competencial y significativa, proporcionando en una fase inicial al alumnado las herramientas básicas para que posteriormente, de forma autónoma, pongan en práctica todo lo aprendido en un proyecto final como es la representación coreográfica. Teniendo en cuenta el valor educativo que tiene esta actividad, el presente artículo tiene como objetivo contextualizar el acrosport dentro del marco educativo actual, describir sus características y beneficios, y finalizar con una propuesta metodológica práctica y su correspondiente evaluación formativa

Handgrip strength and hand dimensions in high-level inter-university judoists

Background and Study Aim: Handgrip strength plays a major role in many sports. In Judo, a single grasp allows the judoka to attack, defend and counter-attack through different movements in a span of four to six directions. Some general and hand-specific anthropometric measurements have been positively related to handgrip strength. Therefore, the aim of this study was the influence of general and hand anthropometric parameters in handgrip strength and sport achievement. Material and Methods: Fifty four judokas aged 19-25 years participants of the Inter-University Championship of Spain 2009 took part in this study. Body height and body mass were measured and body mass index was calculated as general anthropometric parameters. Three groups of hand specific parameters were measured: finger spans, finger lengths and hand perimeters. The handgrip strength was measured by digital dynamometer in both hands. Results: The general and some hand-specific (finger lengths, hand perimeters) measurements were significantly different among the weight groups (p<0.05) and positively correlated with handgrip strength for the whole group. However, only a few measurements – IFL,MFL,P4,P5 – were positively correlated among weight groups. Poor correlations were found between hand-specific variables – TL,IFL,MFL,P4 – and sport achievement. Only P3 was highly correlated with sport achievement and together with FS1 explained 44.4% of its variance. Conclusions: The results indicate that the handgrip strength is mostly dependent on the basic (body height) and hand-specific (IFL, MFL, and P4) anthropometric parameters in judokas. Sport achievement was related to hand perimeter (P3), but its variability was weakly explained and thus hand-specific measurements may not be good predictors for judo performance

La investigación en biomecánica aplicada a la natación olímpica: Evolución histórica y situación actual

A lo largo de los años, los records mundiales en natación han mejorado de forma notable respecto a otros deportes. Esto se ha debido, tanto a la mejora de la condición física de los nadadores como a la evolución de las técnicas de nado. Gran “culpa” de esto se debe al avance científico en el que se ha visto inmerso este deporte. El presente trabajo tiene como objetivo presentar de una forma organizada y coherente la evolución histórica de la investigación en biomecánica aplicada a la natación. Así, se presentan los investigadores más relevantes, pero también sus descubrimientos y métodos utilizados para alanzarlos. De esta manera el lector entenderá cuándo y por qué aparecieron conceptos como “resistencia hidrodinámica”, “hull speed”, “vórtices”, etcThroughout decades, world records in swimming have improved significantly compared to other sports. This is due both to the improvement of the swimmers physical condition and the improvemnet of swimming techniques. In part this is due to scientific progress. The aim of this paper is to present in an organized and coherent way the historical evolution of research in biomechanics applied to swimming. Thus the most relevant researchers, but also their discoveries and methods are presented. In this way the reader will understand when and why appeared concepts as "drag ", "hull speed", "vortex", et

Effects of different backpack loads in acceleration transmission during recreational distance walking

It is well established nowadays the benefits that physical activity can have on the health of individuals. Walking is considered a fundamental method of movement and using a backpack is a common and economical manner of carrying load weight. Nevertheless, the shock wave produced by the impact forces when carrying a backpack can have detrimental effects on health status. Therefore, the aim of this study was to investigate differences in the accelerations placed on males and females whilst carrying different loads when walking. Twenty nine sports science students (16 males and 13 females) participated in the study under 3 different conditions: no weight, 10% and 20% body weight (BW) added in a backpack. Accelerometers were attached to the right shank and the centre of the forehead. Results showed that males have lower accelerations than females both in the head (2.62 ± 0.43G compared to 2.83 + 0.47G) and shank (1.37 ± 0.14G compared to 1.52 ± 0.15G; p0.05). The body acts as a natural shock absorber, reducing the amount of force that transmits through the body between the foot (impact point) and head. Anthropometric and body mass distribution differences between males and females may result in women receiving greater impact acceleration compared to men when the same load is carried