Recent Submissions

  • Saturated and cis- and trans-unsaturated fatty acids intake in rural and urban Costa Rican adolescents 

    Monge Rojas, Rafael; Campos Núñez, Hannia; Fernández Rojas, Xinia Elena (2005)
    Objective: The purpose of this study is to determine whether intake of saturated fatty acids and cis- and trans-unsaturated fatty acids is associated with an urban compared to a rural lifestyle, and whether these associations ...
  • Carotenoid concentrations in vegetables and fruits common to the Costa Rican diet 

    Furtado, Jeremy; Siles Díaz, Xinia; Campos Núñez, Hannia (2004)
    The intake of vegetables and fruits has been shown to reduce the risk of multiple diseases in many different populations. Various components of these foods have been investigated to explain the protective effects. Carotenoids, ...
  • Cerveza como rehidratante 

    Aragón Vargas, Luis Fernando (2014-10-10)
    Entrevista televisiva del Doctor Gustavo Gutierrez Espeleta en el programa ConCiencia (Canal UCR) a los investigadores Rebeca Flores y Luis Fernando Aragón sobre los resultados de su imvestigación sobre la cerveza como ...
  • Relación entre indicadores antropométricos y masa grasa medida por deuterio en escolares costarricenses 

    Marín Arias, Lilliam; Zamora Salas, Juan Diego; Laclé Murray, Adriana (2019)
    El propósito de este estudio fue identificar la relación entre la masa grasa expresada como porcentaje de grasa corporal (%GC) medida por el método de deuterio (D2O) e indicadores antropométricos en escolares costarricenses. Se ...
  • Evaluación antropométrica y composición corporal por medio de óxido de deuterio en escolares costarricenses 

    Zamora Salas, Juan Diego; Laclé Murray, Adriana (2018)
    El objetivo del estudio fue determinar el estado nutricional de escolares costarricenses de seis a nueve años. Participaron 103 escolares (54 niños y 49 niñas) con un promedio de edad de 7,8 ± 0,9 años. Se evaluó peso, ...
  • Effects of fasting on endurance exercise 

    Aragón Vargas, Luis Fernando (1993)
    Early studies agree that fasting is detrimental to overall physical performance and to endurance performance in humans; however, a study in rats reporte an ergogenic effect where time to exhaustion was increased by a ...
  • As seen from national levels: Developing world 

    Mata Jiménez, Leonardo; Mohs Villalta, Edgar (1978)
    The grim.realities involved with the solution of such world problems as .' food, energy and pollution make it difficult to address such issues with 'vhptimism (Meadows et al. 1972; Mesarovic and Peste! 1974). On the ...
  • The nature of the nutrition problem 

    Mata Jiménez, Leonardo (1978)
    This paper attempts to conceptualize malnutrition from an ecological point of view. One definition of malnutrition, a term that in Spanish can be rendered by either 'desnutricion' or 'malnutricion', is: a pathologic ...
  • Comparison of Tropical and Temperate Zone Diarrheal Problems 

    Mata Jiménez, Leonardo (1978)
    In the past. we thought there were differences hetween tropica! and temperate zones in the etiology of intestinal diseases. Recent observations indicate that such differences do not exist. Infectious agents are ubiquitous. ...
  • Breast-feeding: main promoter of infant health 

    Mata Jiménez, Leonardo (1978-11)
    Unique immunological factors in breast milk arc responsible for the protection it affords infants against pathogenic agents. This protection is panicularly effective against the infectious agents which invade or colonize ...
  • Influence of Mild Dehydration on Exercise Performance 

    Aragón Vargas, Luis Fernando (2001-12)
    This presentation summarizes some initial evidence for an impairment of exercise performance due to mild dehydration. An attempt is made at defining mild dehydration, and preliminary hypotheses are presented.
  • Effects of fasting on endurance exercise in adult males: preliminary evidence for a "nocebo" effect 

    Beltranena Falla de Enríquez, María Mercedes; Aragón Vargas, Luis Fernando; Salazar Rojas, Wálter (1998)
    The literature has repeatedly reported a negative effect of fasting on endurance exercise in humans. The goal of this study was to test the hypothesis that endurance performance is susceptible to a “negative placebo” or ...
  • Evaluación del efecto de la espirulina para reducción de peso en mujeres universitarias 

    Beltranena Falla de Enríquez, María Mercedes; Aragón Vargas, Luis Fernando; Salazar Rojas, Wálter (1996)
    Este estudio evaluó el efecto del alga espirulina en el tratamiento de reducción de peso en 15 mujeres universitarias, grupo control (n=7) y grupo experimental (n=8). El tratamiento consistió en tres tomas de una cápsula ...
  • New developments in sports nutrition: introduction and historical overview 

    Aragón Vargas, Luis Fernando (2003)
    The science of sports nutrition is quickly growing to maturity. The last two decades have seen the publication of the International Journal of Sports Nutrition and many sound textbooks such as those edited by Ron Maughan ...
  • Cómo distinguir entre la ciencia y la especulación en la nutrición deportiva 

    Aragón Vargas, Luis Fernando (1998)
    Se analiza cómo muchas personas son presa de su propio deseo de lograr resultados sin hacer el esfuerzo correspondiente. Además, se presentan sugerencias sobre cómo discernir la afirmaciones falsas de las que quizás sí ...
  • Attività fisica ed idratazione: quando l’acqua non basta 

    Aragón Vargas, Luis Fernando (2005-10)
    During sports training and games, thermoregulation may be a challenge when environmental conditions are hot and/or humid. In addition, limited opportunities to drink may promote dehydration and exacerbate the thermoregulatory ...
  • Efeitos da Desidratação no Rendimento Físico e na Saúde 

    Aragón Vargas, Luis Fernando (2001)
    As pessoas fisicamente ativas devem prestar atenção a sua hidratação. A desidratação tem efeitos negativos sobre o funcionamento do corpo, que vão desde pequenas diminuições no rendimento físico, até problemas por calor ...
  • Metabolic and Performance Responses to Carbohydrate Intake During Exercise 

    Aragón Vargas, Luis Fernando (2000-09)
    During exercise, an adequate supply of substrates is required for the continuing resynthesis of ATP in working muscles. Muscle fibers have limited stores of creatine phosphate, glycogen, and triglycerides and so must also ...
  • Prevalencia de parasitosis en niños de 1 a 7 años en condición de vulnerabilidad en la Región Central Sur de Costa Rica 

    Solano Barquero, Melissa; Montero Salguero, Adrián; León Alán, Dennis; Santamaría Ulloa, Carolina; Mora Mora, Ana María; Reyes Lizano, Liliana (2018)
    Objetivo: Actualizar la información sobre la prevalencia de parasitosis en niños en Costa Rica y la relación de esta con factores socioeconómicos. Metodología: se realizó un estudio para determinar la prevalencia de ...
  • Duración de la lactancia materna exclusiva en una comunidad urbana y otra rural de Costa Rica 

    Marín Arias, Lilliam; Ureña Cascante, María Elena; Fernández Rojas, Xinia Elena (2018)
    Objetivo: Indagar la duración de la lactancia materna exclusiva en una comunidad urbana y una rural de Costa Rica. Método: Se realizó un estudio descriptivo transversal sobre el inicio y duración de la lactancia materna ...

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