Entrenamiento de variables psicológicas para los tiros libres

En este trabajo se presenta el plan de trabajo realizado para un jugador profesional de baloncesto, cuyo objetivo era mejorar el rendimiento en los tiros libres. El porcentaje de acierto mejoró durante las sesiones de trabajo, pero no tanto los resultados durante la competición de liga regular. Se describe el modelo de trabajo empleado, sus objetivos y sus resultados. También se analiza la eficacia del entrenamiento psicológico realizado y se ofrecen algunas pautas para mejorar los resultados en trabajos similares.This paper presents the training schedule, performed for a basketball professional player, whose objective was to improve at free throws. The averaged accuracy improved along the sessions, but not so much the results at the regular season competition. The model of work employed is shown, as the objectives and results. Also, we analyse the effectiveness of the performed psychological training and some guidelines to obtain better results in similar cases are given

Purificación y caracterización de endoglucanasa III de Trichoderma reesei QM9414

Endoglucanasa iii (eg iii) es una de las enzimas principales del sistema celulasa del hongo trichoderma reesei. En este trabajo se describe un nuevo método de purificación de eg iii que ha permitido disponer de preparados altamente homogéneos de la enzima para abordar su caracterización tanto a nivel estructural como mecanistico. Eg iii tiene una masa molecular de 48 kda, pi 5.1, coeficiente de sedimentacion 3.66 s y razon friccional 1.48; posee 12 cisteinas formando 6 puentes disulfuro. La hidrólisis de b-glicosidos catalizada por eg iii transcurre con retención del carbono anomerico del sustrato, mediante un mecanismo secuencial ordenada uni-bi, con el concurso de un intermediario glicosilenzima. Análogamente a la lisozima, eg iii tiene dos grupos carboxilo esenciales para la catalisis, glu-218 que debe estar protonado y glu-329 que debe estar ionizado en la forma activa de la enzim

Evaluating Sustainability of Mass Rapid Transit Stations in Dubai

A transport business that has reached financial sustainability is one that is providing a service at a price that not only covers its costs but also creates a profit for upcoming contingencies. A focus on rail infrastructure financial sustainability is of paramount importance to guarantee the availability of punctual rail transport to remote potential users. To evaluate the sustainability of mass rapid transit on the relation among hypothetical key aspects of sustainability—perception of property; willingness to pay for maintenance, repair, and operations; confidence in the Roads and Transport Authority; and citizen participation in the rail project—and railway service punctuality, the most important result variable, was studied according to the specialized literature on rail transport sustainability. Leading information was collected by means of personal questionnaires of more than 1000 railway users according to the Krejcie Morgan formula for the calculation of the sample size knowing the population size. Qualitative plus quantitative information was gathered from different ways (technical test of the rail system, discussions with users, focus-group discussions, and interviews with key informers).The outputs by means of the statistical analysis allowed understanding two key perceptions. Firstly, beyond a half decade after construction, during a system intervention, a smaller perception of public property for the railway system was related to better service punctuality. This idea contrasts with the vast majority of the publications, which highlight a regular, direct relationship between perception of property and sustainability of railway systems. Secondly, in spite of three-quarters of users accepting that they would contribute monetarily for maintenance, repair, and operations service, such payments were not imminent because of the lack of confidence in the Roads and Transport Authority. In this situation, more than one-third of the metro stations were identified as non-punctual, beyond a half decade after construction

Predicting relative load by peak movement velocity and ratings of perceived exertion in power clean

Evaluating an individual’s maximal strength is considered a key factor in prescribing and regulating resistance training programs in athletes. The present study analyzed the suitability of predicting the relative load lifted in the power clean exercise from the peak movement velocity and perceived exertion. In order to determine the full-load velocity and load-perceived exertion relationships, 154 young, resistance-trained male athletes performed a 4- to 6-set progressive test up to the one-repetition maximum. Longitudinal regression models were used to predict the relative load from the peak velocity and the OMNI-RES 0-10 scale, taking sets as the time-related variable. Load associated with peak velocity and with perceived exertion scale values expressed after performing 1 or 2 repetitions, were used to construct two adjusted predictive equations: Relative load = 128.85 – 25.86 × peak velocity; and Relative load = 31.10 + 7.26 × OMNI-RES 0–10 scale value. Although both models provided effective estimates of relative load, the coefficient of determination (R2) of the OMNI-RES perceived exertion scale was larger than when using the peak movement velocity model (88% vs. 46%). These findings highlight the importance of perceived exertion to estimate strength performance in the power clean exercise

Relative load prediction by velocity and the omni-res 0-10 scale in parallel squat

This study analyzed the possibility of using movement velocity and the perceived exertion as predictors of relative load in the parallel squat exercise. In order to determine the full load-velocity and load-perceived exertion relationships, 290 young, resistance-trained athletes (209 male and 81 female) performed a progressive strength test up to the one-repetition maximum. Longitudinal regression models were used to predict the relative load from the average velocity and the OMNI-RES 0-10 scale, considering sets as the time-related variable. Two adjusted predictive equations were developed from the association between the relative load and the average velocity or the perceived exertion expressed after performing several sets of 1 to 3 repetitions during the progressive test. The resulting two models were capable of estimating the relative load with an accuracy of 79% and 86% for the average velocity [Relative load (% 1RM) = 120.15 – 83.54 (AV)] and the exertion [Relative load (% 1RM) = 5.07 + 9.63 (RPE)] respectively. The strong association between relative load with average velocity and the perceived exertion support the use of both predictive variables to estimate strength performance in parallel squat

Loading intensity prediction by velocity and the OMNI-RES 0–10 scale in bench press

This study examined the possibility of using movement velocity and the perceived exertion as indicators of relative load in the bench press exercise. Three hundred eight young, healthy, resistance trained athletes (242 male and 66 female) performed a progressive strength test up to the one-repetition maximum for the individual determination of the full load-velocity and load-exertion relationships. Longitudinal regression models were used to predict the relative load from the average velocity and the OMNI-RES 0-10 scale, considering sets as the time-related variable. Load associated with the average velocity and the OMNI-RES 0-10 scale value expressed after performing a set of 1-3 repetitions were used to construct two adjusted predictive equations: Relative load = 107.75 – 62.97 × average velocity; and Relative load = 29.03 + 7.26 × OMNI-RES 0-10 scale value. The two models were capable of estimating the relative load with an accuracy of 84% and 93% respectively. These findings confirm the ability of the two calculated regression models, using load-velocity and load-exertion from the OMNI-RES 0-10 scale, to accurately predict strength performance in bench press