RESUMEN:El objetivo del estudio fue conocer cuáles son los motivos de práctica en el ámbito de la actividad física no competitiva. Para ello se administró la escala de medición de los motivos de actividad física revisada (MPAM-R, Motives for Physical Activity Measure-Revised) de Ryan, Frederick, Lepes, Rubio y Sheldon (1997) y validada en España por Moreno, Cervelló y Martínez (2007) a una muestra compuesta por 271 sujetos adultos practicantes de actividades físicas no competitivas. Se realizó un análisis factorial de componentes principales de la escala y un análisis de correlación de las distintas subescalas. Los resultados manifiestan que las principales razones para realizar actividades físicas son el fomento de las relaciones sociales así como la obtención de placer y diversión, por delante de otras como la competencia, el mantenimiento y mejora de la salud y la apariencia.Palabras clave: motivos, deporte, actividad física, salud, fitness. ABSTRACT:The objective was to study what are the reasons of practice in the field of noncompetitive physical activity. To this end, the scale of measurement of physical activity based on revised (MPAM-R, Motives for Physical Activity Measure-Revised) Ryan, Frederick, Lepes, Rubio and Sheldon (1997) and validated in Spain by Moreno, Cervelló and Martínez (2007) was given to a sample of 271 adult subjects practicing uncompetitive physical activities. We conducted a principal components factor analysis of scale and a correlation analysis of the subscales. The results show that the main reasons for physical activity are the promotion of social relations and the achievement of pleasure and fun, ahead of other as competition, maintaining and improving health and appearance.
Throwing in handball is the most decisive action in success or failure in the offensive phases of the game. In order to study and analyse this, it is necessary to measure the throwing speed during the competition. This research aimed to achieve two objectives; the first one, to compare the average throwing speed between the first and the second half of the organized offensive phase during the 2013 Men´s World Handball Championship. The second, to describe the throwing speed between the first and the second half during the 2013 Men´s World Handball Championship with respect to its effectiveness (a goal/not a goal). Throwing speeds were registered in 47 matches in the 2013 World Handball Championship using a radar (StalkerPro S.A., Plano), with a frequency of 100 Hz and a sensitivity of 0.045 m/sec-1, fixed on a tripod behind the goal. Statistical analysis was carried out using SPSS software (version 22). The Kolgomorov-Smirnov test was used to check normality and homogeneity. The results show non-parametric variables. Subsequently, the variables were analysed with the Mann-Whitney U-test. Statistically significant differences were not found in the average throwing speed between the first and the second half of the matches of the World Championship, nor in its throwing effectiveness. These results show that fatigue is not a variable that influences the throwing
The studies that analyse the throwing speed in the different positions on the field in high-performance handball are scarce. These contributions are nonexistent if the analysis refers to the throwing speed during the competition. For this reason, the objective of this research was to analyse the throwing speed in the central positions during the matches at the 23rd Men´s World Handball Championship. Three thousand two hundred and forty-two throws in the matches of this championship were analysed. The throwing positions tested were the left back, the centre back and the right back. A radar (StalkerPro S.A., Plano), with a frequency of 100 Hz and a sensitivity of 0.045 m/s1, fixed on a tripod behind the goal, was used. Analysis was performed using SPSS software (version 22). The variables were analysed with the Mann-Whitney Utest. Statistically significant differences were not found among all the throws carried out by the participating teams in the championship. There are statistically significant differences in the throwing speed between the best 8 teams with respect to the other 8 teams of the championship in the central position in the first half of the match (p>0,05), both for the total number of throws and the effectiveness (goal/not a goal). The best teams obtain higher throwing speed in the central position, but there is no difference in relation to
Introducción/justificaciónEn la práctica de las actividades acuá-ticas, cada vez más, nos encontramos con un mayor número y variedad de materiales. Entre éstos, se encuentran las aletas que, como bien es sabido, aumentan la velocidad de desplazamiento en el medio acuático.En la actualidad, existen multitud de tipos de aletas, con diferentes diseños y características. Cada una de ellas presenta unas ventajas en función de la actividad para la que se ha creado. Sin embargo, no existen aletas específicas para el rescate acuático y existen pocos estudios que hayan analizado la eficacia de los diferentes tipos de aletas en el rescate acuático. Por otro lado, surgen también diseños polivalentes que tratan de ofrecer una utilización eficaz independientemente de la actividad realizada. Esto nos lleva a plantearnos cuál de éstas es más adecuada para el rescate de una víctima.Entre las diferentes fases que realiza un socorrista cuando efectúa un rescate acuático, nos encontramos con la aproximación al accidentado y el remolque de éste hacia un lugar seguro, como fases donde se realiza un traslado en el agua. La primera fase es realizada por el socorrista únicamente y, la segunda, la realiza el socorrista transportando al accidentado. J.A. ABRALDES VALEIRAS -VALORACIÓN DE LAS ALETAS EN FUNCIÓN DEL TIEMPO EMPLEADO EN PRUEBAS... VALORACIÓN DE LAS ALETAS EN FUNCIÓN DEL TIEMPO EMPLEADO EN PRUEBAS DE NADO Y REMOLQUE DE MANIQUÍ RESUMENEl objetivo del presente trabajo fue investigar los efectos de utilizar diferentes tipos de aletas sobre el tiempo de nado con y sin maniquí. Participaron en este estudio 13 sujetos, todos ellos varones, con una edad media de 22,9 ± 0,8 años, un peso de 74,5 ± 8,7 kg. y una altura de 175,7 ± 6,8 cm. Los sujetos realizaron dos pruebas de 50 m de distancia, una de nado y otra de remolque. Ambas pruebas se realizaron sin utilizar aletas, con aletas blandas, cortas, duras y de fibra, en orden aleatorio y con un descanso mínimo de 30 minutos entre una modalidad y otra. Los resultados mostraron que no existen diferencias significativas entre utilizar aletas y no en la prueba de 50 m nado, y sí existen para la prueba de 50 m remolque. También se observó que las aletas de tipo duro contribuyeron a una mayor velocidad en las pruebas de nado y remolque. En todos los casos se apreció el efecto de la fatiga en la segunda parte de la prueba, siendo significativa en la prueba de 50 m remolque.Palabras clave: nado, rescate, aletas, velocidad. ABSTRACTThe objective of the present paper was to evaluate the effect of different swim fins in trials of free swimming and manikin carry. The sample consisted of 13 subjects (all males, average age of 22.9 ± 0.8 years, average weight of 74.5 ± 8.7 kg, and average height of 175.7 ± 6.8 cm). The subjects swam under two situations, both a distance of 50m, one free swimming and the other swimming while carrying a manikin. These situations were done under each of the following conditions: without fins, with soft fins, with short fins, with hard fins, and with fibre fins. The or...
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