Early-Life Metabolic Traits and Physical Fitness in Tarahumara, Mennonite, and Mestizo Adolescents from Northern Mexico.

The WHO identifies high BMI, high blood pressure, and high fasting plasma glucose as chronic disease risk factors, whereas physical fitness is identified as a protective behavioral factor. This study responds to the rising interest in assessing metabolic factors and physical activity within young populations of Mestizo, Tarahumara, and Mennonite from Chihuahua Mexico, due to its strong relationship with disease development and low well-being. A cross-sectional study was conducted with 201 teenagers from rural towns in Northern Mexico, and relationships between physical fitness and cardio-metabolic risk related to anthropometric, glycolipid, and vascular function factors were assessed. ANOVA-tested differences among ethnic groups using physical fitness as a grouping variable and measures of cardio-metabolic risks were used as dependent variables. A stepwise regression analysis allowed us to identify the best predictors for physical fitness. Clinical risk factors were analyzed by ethnic group and sex. No differences were found among ethnic groups in physical fitness and cardio-metabolic health risks; sex differentiated higher health risks related to behavioral factors, since young women showed lower physical fitness across ethnicities. Clinically, the Mestizo sample showed higher numbers of individuals with one risk factor. Mennonites showed a high frequency of anthropometric and fitness health risks with low glycolipid and vascular risks. Tarahumara had fewer risk factors as compared with both Mestizo and Mennonite. Rural populations are harder to reach, both for health assessment and intervention; health professionals must work close to local community organizations to gain access.

Composition and Factorial Invariance for the Assessment of Body Image Dissatisfaction Questionnaire in Mexican Adolescents.

Body image is a mental representation that a person has, which could become a body dissatisfaction due to the pressure exerted by the culture, affecting several life stages specially in adolescents. The aim of this study was to analyze the psychometric properties and factorial invariance of the questionnaire to assess body image dissatisfaction. The sample consisted of 552 Mexican teenagers, 259 female, and 293 male, with a mean age of 12.91 ± 0.96 years. Confirmatory Factor Analyses show that a five-factor structure is viable and adequate. The five-factor structure (perceptual, emotional distress, behavioral, proposal to change, and fear of gaining weight) show adequate fit indices and validity, even though the obtained model does not completely correspond to that proposed by the authors of the scale, it continues to endorse the multifactorial component of body dissatisfaction. On the other hand, the factorial structure, the factor loadings, and the intercepts are considered invariant in both populations; however, there are differences between the populations for the means of the perceptual, emotional distress, and fear of gaining weight factors. This study serves as a premise for future research on the study of instruments for measuring body image in populations with different personal and cultural factors.

V Coloquio Internacional de Psicología del Deporte Público REDDECA. Composición e invarianza factorial de la versión corta del Physical Self Description Questionnaire en adolescentes mexicanos / V Coloquio Internacional de Psicología del Deporte Público REDDECA. Composition and factorial invariance of the Short Version of the Physical Self Description Questionnaire among Mexican adolescents / V Coloquio Internacional de Psicología del Deporte Público REDDECA. Estrutura e invariancia fatorial do versão curta de Physical Self Description Questionnaire em adolescentes mexicanos

El objetivo de esta investigación fue analizar las propiedades psicométricas propuestas por Marsh, Martin y Jackson (2010) para la versión corta del Physical Self Description Questionnaire (PSDQ-S). La muestra total fue de 915 adolescentes mexicanos 400 deportistas y 515 no deportistas, con edades comprendidas entre 11-15 años (M = 12.33; DE = 1.43). La estructura factorial del cuestionario se analizó mediante análisis factoriales confirmatorios. Los análisis, muestran que una estructura de nueve factores (actividad física, apariencia, grasa corporal, coordinación, resistencia, flexibilidad, salud, competencia deportiva y fuerza) es viable y adecuada tanto para la muestra total (GFI .964; RMSEA .030; CFI .981) como para las poblaciones de adolescentes mexicanos deportistas (GFI .921; RMSEA .049; CFI .946) y no deportistas (GFI .943 y RMSEA .049; CFI .970). La estructura de nueve factores, atendiendo a criterios estadísticos y sustantivos, ha mostrado adecuados indicadores de ajuste de fiabilidad y validez. Por otro lado, la estructura factorial, las cargas factoriales y los interceptos se consideran invariantes de acuerdo a la variable práctica deportiva; sin embargo, existen diferencias significativas a favor de los deportistas en cuanto a su autoconcepto físico: actividad física (-1.243, p <0.001), grasa corporal (-0.212, p <0.05), coordinación (-0.765, p <0.001), resistencia (-0.882, p <0.001), flexibilidad (-0.427, p <0.001), salud (-0.172, p <0.05), competencia deportiva (-1.026, p <0.001) y fuerza (-0.614, p <0.001). En conclusión, el PSDQ-S puede ser una herramienta útil para avanzar en el estudio de los factores que afectan al autoconcepto físico

The aim of this research was to analyze the psychometric properties proposed by Marsh et al. (2010) for the Physical Self Description Questionnaire (PSDQ-S). The total sample has been composed by 915 Mexican adolescents, 400 athletes and 515 non-athletes, with ages from 11 to 15 years (M = 12.31, SD = 1.43). The factor structure of questionnaire has been analized through the confirmatory factor analysis. This analysis shows that a nine factors structure is viable and adequate for the total sample (GFI .964; RMSEA .030; CFI .981) and the populations of athletes (GFI .921; RMSEA .049; CFI .946) and non-athletes (GFI .943 y RMSEA .049; CFI .970). The nine factors structure (physical activity, appearance, body fat, coordination, endurance, flexibility, health, sport competence, and strength), according to statistical and substantive criteria, has shown adequate indicators of reliability and validity adjustment. On the other hand, the factorial structure, the factorial loads and the intercepts are considered invariant according to the variable sports practice; however, there are differences between athletes and non-athletes in favor of athletes in terms of their physical self-concept: physical activity (-1,243, p <0.001), body fat (-0.212, p <0.05), coordination (-0.765, p <0.001), endurance (-0.882, p <0.001), flexibility (-0.427, p <0.001 ), health (-0.172, p <0.05), sports competition (-1.026, p <0.001) and strength (-0.614, p <0.001). In conclusion, the PSDQ-S can be a useful tool to advance in the study of the factors that affect the physical self-concept

O principal objetivo deste estudo foi analizar as propiedades psicométricas propostas por Marsh et al. (2010) para a versão curta de Physical Self Description Questionnaire (PSDQ-S). Amostra total foi de 915 adolescentes mexicanos 400 atletas e 515 não- atletas com idades entre 11-15 anos (M = 12.33; DE = 1.43). A estrutura fatorial foi analisado com anàlise fatorial confirmatòria. Os analises mostran a estrutura do nove fatores (atividade física, aparência, gordura corporal, coordenação, resistencia, flexibidade, saúde, competencia esportiva e força) e factível e adequado para a mostra total (GFI .964; RMSEA .030; CFI .981) e para ambas as populações, atletas (GFI .921; RMSEA .049; CFI .946) e não atletas (GFI .943 y RMSEA .049; CFI .970). A estrutura de nove fatores, em resposta a criterios estatísticos e materiais tem mostrado indicadores de ajuste adequados de confiabilidade e validade. Além disso a estrutura de fatores, cargas fatoriais e intercepto são considerados invariantes em variável prativa esportiva, porém diferenças entre atletas e não atletas forom encontrados em favor dos atletas em termos de seu autoconceito físico: atividade física (-1,243, p <0,001), gordura corporal (-0,212, p <0,05), coordenação (-0,765, p <0,001), resistência (-0,882, p <0,001), flexibilidade (-0,427, p <0,001 ), saúde (-0,172, p <0,05), competição esportiva (-1,026, p <0,001) e força (-0,614, p <0,001). Em conclusão, el PSDQ-S pode ser uma ferramenta útil para avançar no estudo dos fatores que afetam o autoconceito físico

Physical activity, cardio-respiratory fitness, and metabolic traits in rural Mexican Tarahumara.

OBJECTIVES: To study the association between physical activity energy expenditure (PAEE) and cardio-respiratory fitness (CRF) with key metabolic traits and anthropometric measures in the Tarahumara of Mexico. METHODS: A cross-sectional study was carried out in five rural communities in Chihuahua, México including 64 adult Tarahumara, mean (SD) age 40.7 (12.9) years. Using a combined accelerometer and heart rate sensor, PAEE was measured over three consecutive days and nights and a sub-maximal step test was carried out in order to (1) calibrate heart rate at the individual level and (2) to estimate CRF. Random blood glucose level and resting blood pressure (BP) were measured with standard anthropometrics. RESULTS: Mean (SD) PAEE was 71.2 (30.3) kJ kg(-1) day(-1) and CRF was 36.6 (6.5) mlO(2) min(-1) kg(-1) . Mean (SD) glucose was 127.9 (32.4) mg/dl, with 3.3% having diabetes. Mean (SD) systolic and diastolic BP was 122 (20.8) and 82 (14.8) mm Hg, respectively, with 28.1% having hypertension. Mean body mass index was 27.5 (4.2) kg m(-2) , with 71.9% being overweight. Following adjustment for age and sex, weak inverse associations were observed between PAEE and systolic BP (ß = -0.20, P = 0.27) and diastolic BP (ß = -0.16, P = 0.23); and between CRF and systolic BP (ß = -0.51, P = 0.14) and diastolic BP (ß = -0.53, P = 0.06). The inverse associations with glucose were also weak and not statistically significant for neither PAEE (ß = -0.01, P = 0.63) nor CRF (ß = -0.05, P = 0.27). CONCLUSIONS: This study suggests high levels of overweight and hypertension in the Tarahumara, and points to fitness and physical activity as potential intervention targets although findings should be confirmed in larger samples.