Revista Iberoamericana de Ciencias de la Actividad Física y el Deporte

6-18

Authors: Montes Fernández, A. y Rojo Rodríguez, J.

The intention of this study is to investigate if the use of the grip with Velcro fasteners, increases the effectiveness of volleying in padel tennis. A total of five people (5 males) with an average age of 22,8 ± 0,84 years, were recruited to take part voluntarily in this quasi-experimental study. The election of the sample was intentional, according to the inclusion criterions. All the sample took part of adaptational lessons as well as the “Effectiveness test of volleying in padel tennis” with and without the grip. The results obtained show us that the sample had better results of effectiveness when using the grip with Velcro fasteners (p<0,01). Due to these results, we conclude that using the grip with Velcro fasteners is more effective for volleying in padel tennis than using the random grip.

19-27

Authors: Jimenez-Perez, I., Lucas-Cuevas, A.G., Priego, J.I., Aparicio, I., Giménez, J.V., Gil, M., Llana-Belloch, S. y Pérez-Soriano, P.

"The aim of this preliminary study was to compare the influence of footwear and" "the fatigue state on the muscle activity of the tibialis anterior, peroneus longus, gastrocnemius medialis and gastrocnemius lateralis. For this purpose, 7 participants ran a 20-min fatiguing run on a treadmill at 1% slope at 75% of their individual maximal aerobic speed. Muscle activation was measured twice during 30 seconds before and after the fatiguing run while running shod and barefoot. Before the fatiguing run, running barefoot led to a greater activation of the peroneus longus compared to running shod. When running fatigued, running barefoot also increased the activation of the tibialis anterior compared to running shod. Moreover, the fatigue state decreased the gastrocnemius medialis activity" "when running shod."

14-23

Authors: Miguel Ángel Torralba, José María Padullés, Marcelo Braz Vieira y Helena Olson

The present study aimed to identify differences observed in the sprints races performed by visually impaired athletes. Data were collected from 39 blind athletes from 24 countries participated in the 100 meters Paralympic Games in Beijing 2008. The extracted data allow to assess race time (s), average speed (m/s), number of steps, average frequency (Hz), mean of step time (s) and mean of the step amplitude (m), making a comparative study with non-disabled. Recordings of the audio-visual center of Beijing Paralympic Committee (DVD) were collected, and data was processed with SPSS (21.0). Among the results, highlight the importance of stride length and frequency, where the blind athletes show lower results in the first parameter, highlighting a very positive almost no difference in the reaction of output blocks.

9-17

Authors: Hernández P. YH y García G. JM

This study proves the effects of specific power training on youth soccer players with results expressed on the graphic of power vs. load. The exercise observed was the loaded jump. This analysis was developed with 49 soccer players, with an average age of 17.29 (± 0.791) years. Players were divided in two groups, the first group identified as EXG (S+P), received special training to increase the power levels; additionally to their regular soccer training they received in the club. The program was designed using specific individual loads, which were identified to be used for each player after evaluating their best value of initial average power, using the device Isocontrol 5.2. The first group developed the following exercises: 1) power cleans, 2) half squat, 3) loaded jump, and 4) continuous jumps (40-50 cm height). While the second group, identified as CG (S), accomplished only their regular soccer training. The observed variables in the loaded jump were 1RM and optimal load related with the best average power value evaluated in five repetitions. After eight weeks of observation the group EXG increased the weight of the load at which the player expresses its maximum average power. In contrast the group CG did not show changes for the 1RM and optimal load. Conclusions: 1) Associating specific training on power to regular soccer training, working with youth players, improves the optimal load related to 1RM in the practice of loaded jump; 2) The optimal load that lets to express the best average power on loaded jump is around 50% of 1RM; and 3) Weight at which the player expresses its best power value is displaced toward 1 RM.

21-26

Authors: Priego, J.I.; Olaso Melis, J.; Llana-Belloch, S.; Pérez-Soriano, P.; González García, J.C. y Sanchís Almenara, M

Padel is a very popular sport in countries like Spain, Argentina and Brazil, but there is a lack of scientific papers analyzing the harmfulness of their practice. Padel movements could potentially damage the foot and ankle joint. Therefore, the objective of this study was the characterization of the foot role during the execution of the most representative padel movements by techniques of pressurometry and video. The study was divided in two parts: pressurometric analysis of two movements (head-on displacement and split-step), and video recording of the foot during two games. The main conclusions of the study are the importance of forefoot zone in the padel movements, the importance of a specific shoe design for padel practice, and the importance of neuromuscular and proprioceptive training of the ankle and plantar flexors.

34-45

Authors: Lagardera, F. y Masciano, A.

The work starts with a description of a present outlook of the Physical Education and its difficulties to include sensitive learning based on motive behaviour,as it has been historically proclaimed by some great people. The goal is to place the person as the central object of the learning action,considering the subject as a whole, immersed in his reality. Introducing the method Movitransfer from its essence and which was created after a thorough research made by the Argentinian Physical Education teacher Alberto Masciano,at the Olimpia Gymnasium in Chivilcoy, Argentina. In it, uniqueness, meaningfulness, motive interaction, conscious perception, motive tasks designed in stages, and the gymnasium as a motive laboratory are the key concepts. Eventually, the idea is reinforced with very interesting evidence given by the real protagonists.

10-21

Authors: Aragüez-Martín, G; Latorre Muela, JM; Martín Recio, F; Montoro Escaño, J; Montoro Escaño, FA; Diéguez Gisbert, MJ y Mosquera Gamero, A

En el ámbito del deporte, ha venido siendo demostrado, que uno de los factores más importantes para que el deportista pueda rendir en las mejores condiciones es el de tener una buena preparación física. Independientemente del perfeccionamiento técnico, apoyo médico, nutrición, nuevos materiales, etc. la preparación física ha experimentado en los últimos años una evolución extraordinaria, tanto en cantidad como en calidad. En las últimas décadas las ciencias del deporte han evolucionado enormemente, producto de ello son los avances aparecidos en la preparación física en el fútbol a todos sus niveles. En este artículo se analizan las principales tendencias que históricamente han venido empleándose para la mejora de las diferentes cualidades físicas que implican la práctica de este deporte, con el objetivo de alcanzar el mejor rendimiento posible.