César I Ayala Guzmán

Metropolitan Autonomous University | UAM · Departamento de Atención a la Salud

Background Endurance athletes’ competitions have increased over the decades and marathon races are becoming increasingly popular. Proper nutrition is critical for optimal performance and long-term health in marathon athletes. This study aimed to investigate runners’ nutritional intake, especially fluids, food, and supplements, competing in the Sevi...

Background : Phase angle (PhA) is an indicator of cellular health, function, and integrity. PhA has been considered an indicator of nutritional and health status, but it is uncertain whether it could be used as a fitness or athletic performance indicator. Objective : To analyze the relationship between PhA and the fitness and athletic performance o...

Abstract: Introduction: Accurate body composition assessment is needed for an adequate athlete's nutrition care process, and it becomes especially relevant in monitoring weight-sensitive sports. Although standardized protocols have been established for the optimal evaluation of body composition through anthropometry, there are several anthropometri...

Purpose: Metabolic equivalents for youth (METy) are derived using the estimated basal metabolic rate (BMR). However, is unknown whether this METy can be different when measured resting energy expenditure (REE) is used. The purposes of this article are to: (a) To determine whether there is equivalence between METy values calculated using measured RE...

Low energy availability should be directly evaluated, but it has also been measured through low energy availability surrogates (LEAS). The aim of this study was to identify the prevalence of LEAS in a sample of National Team Mexican athletes during pre-competitive stage, and to analyze differences of surrogates according to sex and sport discipline...

Our aim was to develop and validate an equation to predict total energy expenditure (TEE) based on anthropometric measurements and physical activity questionnaires that can be applied among non-institutionalized Mexican adults. To meet this aim, a validation study was conducted with a sample of Mexican adults (n=115, 37% men) that were randomly div...

Introducción: El objetivo del trabajo fue examinar diferencias entre el balance energético (BEN) negativo o la baja disponibilidad energética (DEN) sobre la inflamación inducida por el ejercicio (IIE) y cambios de hormonas sexuales (CHS), de acuerdo con la experiencia deportiva de atletas. Material y métodos: Fuentes de información: Se realizó una...

Introducción: En México ha aumentado la proporción de personas que realizan ejercicio y de quienes consumen suplementos nutricionales (SN), lo cual podría implicar mayor riesgo de consecuencias no deseables para la salud, debido a que su uso no está regulado. Estudios previos han reportado la relación del uso de SN con características sociodemográf...

In recent years the importance of energy availability (EA) in the health and physical performance of athletes has been reported. Nevertheless, there is no standard methodology for its estimation. Therefore, this can lead to differences in estimates of low-EA between samples of athletes. This study aimed to know the correlation, agreement, and accur...

The influence of macronutrient intake on energy availability (EA) has been reported, however, since there’s no standardized method to estimate EA, it’s not clear if there are significant differences in the contribution of macronutrient intake on EA. The aim of this study was to identify the influence of macronutrient intake on EA, analyzing differe...

El objetivo del estudio fue analizar los cambios en la prevalencia de actividad física deportiva (AFD) en adolescentes mexicanos y la asociación de ésta con variables sociodemográficas y la AFD de sus padres o madres. Se trata de un estudio transversal y comparativo en el que se analizó la Encuesta Nacional de Uso del tiempo (ENUT) versiones 2002 y...

Background: Physical fitness is the ability to perform activities of daily living without excessive fatigue. The potential protective role of fitness against high blood pressure in childhood is relevant to diminish the risk of hypertension in adulthood. A negative association between cardiorespiratory fitness (CRF) and hypertension has been found...

El objetivo del estudio fue conocer el cambio en la prevalencia de la práctica deportiva en adultos mexicanos y su asociación con características sociodemográficas. Analizamos la Encuesta Nacional de Uso del Tiempo (ENUT) de México realizada en 2002 y 2014. A través de un cuestionario se indagó la práctica deportiva en la semana previa. Las variabl...

In this paper we analyze differences in self-rated health and happiness according to skin color and ethnicity among Mexican adults. We explore possible factors contributing to these differences in health outcomes, including socioeconomic position, living conditions, and the perception of control over one’s own life. We analyzed the 2010 National Va...

The purpose of this study was to evaluate the validity of prediction equations for estimating maximal oxygen uptake (VO2peak) based on the PACER test and different adiposity indicators in Mexican youth. A convenience sample of youth aged 9–18 years from schools in Mexico City was recruited. VO2peak was evaluated with a laboratory exercise test on a...

Objetivo: Evaluar el impacto de dos programas focalizados de asistencia alimentaria (Oportunidades y Programa Apoyo Alimentario [PAL]). Ello, en la experiencia de inseguridad alimentaria en hogares mexicanos con menores de edad. Metodología: Se analizó la información de la Encuesta Nacional de Ingresos y Gastos de los Hogares 2014; fueron seleccio...

This article documents the differences in socioeconomic position, discrimination experiences and self-perception according to skin color among Mexican adults, considering that the last is a proxy of the phenotype symbolically associated with geographic ancestry (i. e., African, indigenous, or European). The analysis is based on the premise that in...

Background An accurate assessment of physical activity in schoolchildren is necessary to implement strategies that promote active lifestyles. The objective of this study was to validate a self-administered questionnaire to assess physical activity and sedentary behaviors and to analyze differences in the validity according to nutritional status in...

Introducción: La evaluación precisa de la actividad física (AF) en escolares es necesaria para implementar estrategias que favorezcan estilos de vida activos. El objetivo del presente estudio fue evaluar la validez de un cuestionario autoadministrado de AF y actividades sedentarias y ligeras (ASL) desarrollado para escolares mexicanos, analizando l...

Introducción: Sin duda la formación de profesionistas competentes asegura el éxito profesional, productivo, social, cognitivo, cultural y afectivo de los mismos. Derivado de lo anterior, existe una relación estrecha entre la formación de competencias y la exigencia de las mismas en el ámbito laboral. Objetivo: Analizar la relación entre el desarro...

Objetivo: Analizar la relación entre la formación académica recibida con la situación laboral de egresados de la Licenciatura en Enfermería de la UAM-X que iniciaron sus estudios de licenciatura entre el año 2000 y 2006. Metodología: Estudio transversal, retrospectivo y cuantitativo. Se encuestó a 73 egresados de la Licenciatura de Enfermería de la...