Now showing items 89-108 of 114

    • Rapid Changes of Body Weight after a Headstand: A Metrological Analysis 

      Acuña Espinoza, Alejandro; Aragón Vargas, Luis Fernando (2015-05-19)
      Despite recent rules from amateur wrestling sport-governing bodies intended to discourage extreme weight loss measures, wrestling culture still includes varied methods to make weight, including holding a headstand position ...
    • Refinando el tempo de la música para un efecto ergogénico durante el ejercicio de ciclismo estacionario 

      Aburto Corona, Jorge Alberto; Aragón Vargas, Luis Fernando (2017)
      El efecto de la música durante el ejercicio ha sido estudiado desde muchas perspectivas, pero los resultados no han sido del todo claros, probablemente por la falta apropiada de control en la investigación. El propósito ...
    • Refining music tempo for an ergogenic effect on stationary cycling exercise 

      Aburto Corona, Jorge Alberto; Aragón Vargas, Luis Fernando (2017)
      The effect of music on exercise performance has been studied from many perspectives, but the results have not been as clear as expected, probably due to a lack of appropriate controls. The purpose of this study was to ...
    • Rehydration after exercise in the heat: a comparison of four commonly used drinks 

      Shirreffs, Susan Margaret; Aragón Vargas, Luis Fernando; Keil, Mhairi; Love, Thomas D.; Phillips, Sian (2007-06)
      To determine the effectiveness of 3 commonly used beverages in restoring fluid and electrolyte balance, 8 volunteers dehydrated by 1.94% ± 0.17% of body mass by intermittent exercise in the heat, then ingested a ...
    • Reiteraciones de 1RM según rango de movimiento y tiempo de descanso entre intentos 

      Barrantes Segura, Ariel; Aragón Vargas, Luis Fernando (2018)
      Los tiempos de descanso y los rangos de movimiento varían la capacidad de reiteración de 1 RM OBJETIVO: Determinar la influencia del descanso y los rangos de movimiento sobre la reiteración de 1RM para las extremidades ...
    • Relationship between sleep duration affects cognitive function in adolescents 

      Smolarek, André de Camargo; Mascarenhas, Luis Paulo Gomes; Ferreira, Luis Henrique Boiko; Cascante Rusenhack, Marcio Maciel; Moncada Jiménez, José; Souza Junior, Tácito Pessoa de (2016)
      Sleep time may interfere with the ability to perform tasks requiring memory, organization and reasoning. A lack of sleep has been related to cognitive deficits; however, few studies had demonstrated an association between ...
    • Reliability of the maximal oxygen uptake following two consecutive trials by indirect calorimetry 

      Hall López, Javier Arturo; Ochoa Martínez, Paulina Yesica; Moncada Jiménez, José; Ocampo Méndez, Mara Alessandra; Martínez García, Issael; Martínez García, Marco Antonio (2015)
      Background: The maximal oxygen uptake (VO2máx) assessment by indirect calorimetry is the most reliable method to determine VO2máx, but when repeated tests are conducted, the results have been controversial. Aim: To determine ...
    • Respaldo científico al uso de la música en fitness 

      Aragón Vargas, Luis Fernando (2013-12-11)
      • La música es un elemento esencial de muchas formas de ejercicio grupal, tales como el estiramiento, “spinning”, tae-bo, aeróbicos, step, etc. • La música tiene, en general, un efecto positivo sobre los participantes, ...
    • Respaldo científico al uso de la música en fitness (versión preliminar) 

      Aragón Vargas, Luis Fernando (2002)
      La música es una parte esencial del ejercicio en clubes y gimnasios. Pero ¿es ésta una práctica bien fundamentada, u obedece simplemente a aspectos culturales o de tradición? En realidad, aunque en la mayoría de los casos ...
    • La respuesta de la sed a las necesidades de reposición de líquido y a la ingesta controlada después del ejercicio 

      Capitán Jiménez, Catalina; Aragón Vargas, Luis Fernando (2016)
      Se evaluó la percepción de la sed (PS) como variable dependiente: ¿puede ésta distinguir entre distintos niveles de deshidratación aguda? ¿Es confiable? ¿Cómo responde a la ingesta de un volumen fijo de agua después del ...
    • Salvamento Acuático: Prevención y Rescate 

      Aragón Vargas, Luis Fernando; Capitán Rodó, Tabaré (Editorial Universidad de Costa Rica, 1988)
      La cantidad de muertos al año por causa de asfixia por inmersión va cada día en aumento, y es demasiado alta de todos modos. Sólo en Costa Rica, en el año de 1985 hubo 98 ahogamientos por inmersión; entre el año 1982 y ...
    • Some Thoughts on Christianity and Sports 

      Aragón Vargas, Luis Fernando (Conquista Cristiana Enero/Febrero, 1991, 1991-01)
      There is a need to discuss, starting from some basic Christian truths, to what extent the Christian and athletic ideals are compatible; how sports could help modern men and women to be better Christians, and what kind of ...
    • Spatial Codes in Visual-Motor Task Performance: Translation between Vertical and Horizontal Planes 

      Aragón Vargas, Luis Fernando; Worringham, Charles J. (1994-05)
      This study was designed to investigate the effects of plane translation on visual-motor task performance. Two available models that try to explain human motor performance under different operator/machine interaction ...
    • Termorregulación e hidratación en niños que realizan actividad física 

      Aragón Vargas, Luis Fernando (1999)
      Durante la actividad física, los seres humanos generamos calor que debe ser disipado al medio ambiente de manera eficiente, para evitar un aumento en la temperatura corporal que podría ser perjudicial no sólo para el ...
    • The Elite Athlete’s Challenge to Maintain Proper Hydration 

      Aragón Vargas, Luis Fernando (2004)
      This presentation at the Pre-Olympic Congress in 2004 addresses the importance of maintaining proper hydration during sports competition, and the obstacles faced by competitors.
    • The Ethics of Scientific Research (with Particular Emphasis on Exercise and Movement Science) 

      Aragón Vargas, Luis Fernando (2015-07)
      This paper reviews how we arrived at the current state of affairs in the ethical practice of scientific research, discussing some issues that are particularly pertinent to the exercise scientist. The paper focuses on two ...
    • The Need of Other Elements 

      Aragón Vargas, Luis Fernando (2016)
      A number of natural drinks and ingredients used in hydration beverages have been discussed, focusing on their effectiveness for post-exercise rehydration. Because of excess diuresis, complete, rapid, and sustained restoration ...
    • The Sweating Response of Elite Professional Soccer Players to Training in the Heat 

      Shirreffs, Susan Margaret; Aragón Vargas, Luis Fernando; Chamorro, M.; Maughan, Ronald J.; Serratosa, Luis; Zachwieja, Jeff J. (2005)
      Sweat rate and sweat composition vary extensively between individuals, and quantification of these losses has a role to play in the individualisation of a hydration strategy to optimise training and competitive performance. ...
    • Thirst Perception Tracks Progressive Dehydration During Exercise In The Heat 

      Capitán Jiménez, Catalina; Aragón Vargas, Luis Fernando (2014-05)
      Thirst is claimed to be a perfect measure of fluid needs, but insufficient information is available on the association between thirst perception and actual dehydration. Purpose: to assess the strength of the actual ...
    • Thirst response to post-exercise fluid replacement needs and controlled drinking 

      Capitán Jiménez, Catalina; Aragón Vargas, Luis Fernando (2016)
      Perceived thirst (TP) was evaluated as a dependent variable: can it distinguish among several levels of acute dehydration, is it reliable, and how does it respond to the ingestion of a fixed water volume post exercise? In ...