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    Fasting effect on eating behavior in university students / Efecto del ayuno sobre la conducta alimentaria en estudiantes universitarios

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    Abstract Scientific evidence on the characterization of eating behavior indicates that food deprivation situations, such as fasting, the food value increases and alter the fee- ding pattern. Consequently food consumption increases and therefore caloric intake. The situation worsens when after a deprivation period the preferred foods are unhealthy or consumed in excess becoming tiggers for health problems (Capaldi, 1993; Gottschalk , Libby & Graff , 2000; Velez & Garcia , 2003). The aim of this study was to evaluate the effect of fasting on caloric intake and changing food preferences. This study was conducted with the participation of 9 university students who were classified according to their Body Mass Index (BMI) into three groups: Low-weight, Normo-weight and Over-weight. At the baseline participants were exposed to eight different foods. Same participants during the experimental phase were exposed to a period of fasting, subsequently were exposed to the same foods and record their consumption. Results showed that caloric intake and food preferences were altered after the fasting condition, differential effects among participants were observed. Low-weight group increased their food consumption while Normal-weight and Over-weight groups decreased. Resumen La evidencia cient铆fica sobre la caracterizaci贸n de la conducta alimentaria se帽ala que situaciones de privaci贸n de alimento, como el ayuno, aumentan el valor del alimento y modifican el patr贸n alimentario. En consecuencia se incrementa el consumo de alimentos y por ende el consumo cal贸rico. La situaci贸n se agrava cuando los alimentos preferidos despu茅s del periodo de privaci贸n son poco saludables o se consumen en exceso convirti茅ndose en detonadores de problemas de salud (Ca- paldi, 1993; Gottschalk, Libby & Graff, 2000; V茅lez & Garcia, 2003). Con el objetivo de evaluar el efecto del ayuno sobre el consumo cal贸rico y la modificaci贸n de las preferencias alimentarias, se dise帽贸 un estudio en el cual participaron nueve j贸venes universitarios que fueron clasificados de acuerdo a su 脥ndice de Masa Corporal (IMC) en tres grupos: Bajo-peso, Normo-peso y Sobre-peso. Fueron expuestos durante la l铆nea base a ocho alimentos diferentes. Durante la fase experi- mental se expuso a los mismos participantes a un periodo de ayuno y posteriormente a los mismos alimentos registrando su consumo. Los resultados mostraron que el consumo cal贸rico y la preferencia entre alimentos se modificaron. El grupo Bajo-peso aument贸 su consumo de alimento mientras que en los grupos Normo-peso y Sobre-peso lo disminuyeron.
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