RESUMEN

This study aimed to compare and relate the body composition (obtained through anthropometry with the pentacompartmental model and the tricompartmental model by DXA) with bone mineral density and biochemical and nutritional parameters in Chilean adults with overweight/obesity and normal weight from La Araucanía region, Chile. A case-control study was conducted with 116 adults and volunteers from the PURE cohort, collecting sociodemographic data, BMI assessment, waist-to-hip ratio (WHR), and body composition using the pentacompartmental model (5CM) and tricompartmental model (3CM) by DXA, as well as bone mineral density (BMD). Blood biochemical parameters (fasting glucose and lipid profile), physical activity (PA) measured by GPAQ, and average dietary habits (R24h) were measured. In the overweight/obesity group, the 5CM and 3CM adipose mass were indirectly and moderately correlated with PA (p < 0.05), except in the male 5CM group. In the overweight/obesity group, muscle and fat-free mass (FFM) of the 5CM and 3CM correlated directly and moderately with blood fasting glucose (BFG) and BMD (p < 0.05), except in females, where FFM was not related to BMD but was related to residual mass (p < 0.01). Independent of gender and BMI, bone mineral content was positively and highly correlated with BMD (p < 0.0000). In the male overweight/obesity group, bone, skin, and residual mass were correlated with BFG (p < 0.05). In conclusion, for the assessment of non-athletic adult populations, more routine use of the 5CM in clinical practice is recommended.

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RESUMEN

El objetivo de la presente investigación fue determinar el nivel de confiabilidad de las mediciones antropométricas relacionadas al tórax, realizadas por un estudiante de licenciatura en kinesiología (ELK) comparandolas con las de un antropometrista experto (AE). El proceso consistió en el escalonamiento de competencias dividido en tres etapas: i) desarrollo de competencias teóricas y prácticas, ii) Determinar idea de investigación y construcción de su marco teórico y iii) adquisición de confiabilidad, el ELK realizó este ejercicio en relación al AE International Society for the Advancement of Kinanthropometry (ISAK) II. Para este punto, se reclutaron seis participantes, los cuales fueron aleatorizados y medidos por ambos evaluadores. Se registraron los diámetros, perímetros y pliegues relacionados al tórax utilizando los protocolos de la ISAK, para posteriormente calcular el error técnico de la medición (ETM) y el coeficiente de correlación de concordancia de Lin (CCC). El ETM fue el aceptado para diámetros, perímetros y pliegues, salvo en el valor del pliegue bicipital, el que mostró un 5,60 %. La fuerza de la relación fue moderada a sustancial en perímetros y pliegues y pobre en los diámetros entre el ELK y el AE. En conclusión, el ETM se encontró dentro de los rangos permitidos salvo el pliegue bicipital. Sin embargo, ELK mostró un nivel de concordancia moderado a sustancial en perímetros y pliegues y pobre en diámetros de tórax en relación al AE.

The aim of the present investigation was to determine the reliability level of the anthropometric measurements related to the thorax performed by an undergraduate student in kinesiology (ELK) comparing them with those of an expert anthropometrist (AE). The process consisted of the staging of competencies divided into three stages: i) development of theoretical and practical skills, ii) Determine the idea of research and construction of its theoretical framework and iii) acquisition of reliability, the ELK carried out this exercise in relation to the AE International Society for the Advancement of Kinanthropometry (ISAK) II. For this point, five participants were recruited, which were randomized and measured by both evaluators. The diameters, perimeters and folds related to the thorax were recorded using the ISAK protocols, to calculate the technical error of the measurement (ETM) and the correlation coefficient of Lin's concordance (CCC). The ETM was accepted for diameters, perimeters and folds, except for the bicipital fold value, which showed a 5.60 %. The relationship strength was moderate to substantial in perimeters and folds and poor in the diameters between the ELK and the AE. In conclusion, the ETM was found within the permitted ranges except for the bicipital fold. However, ELK showed a moderate to substantial level of agreement in perimeters and folds and poor in chest diameters in relation to AE.

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