Background: Maximal voluntary isometric handgrip strength (MVIHS) is influenced by age, sex, and handedness. Aim: To assess the association of MVIHS with age, sex, and handedness in older adults. Material and Methods: MVIHS was measured using a digital dynamometer in 60 men and 60 women aged 73 ± 6 years. Weight, height and handedness were also recorded. For analysis purposes, participants were divided into two age groups (65 to 70.9 years of age and ≥ 71 years). Results: A negative correlation was observed between age and MVIHS in the non-dominant (r = -0.65 and -0.59 in men and women, respectively) and dominant hands (r = -0.71 and -0.64 in men and women, respectively). When age and MVIHS were correlated in the group aged 65-70 years, a significant correlation was observed in the non-dominant (r = -045 and -0.61 in men and women, respectively) and dominant hands (r = -0.47 and -0.64 in men and women, respectively). In the group aged ≥ 71 years, a stronger correlation with age was also observed in the non-dominant (r = -0.92 and -0.90 in men and women, respectively) and dominant hands (r = -0.95 and -0.90 in men and women, respectively). MVIHS was 2.8 to 8.9% lower in the non-dominant than in the dominant hand in all age groups. MVIHS was lower in women than in men in both age groups. Conclusions: MVIHS declines with age (especially after 71 years of age), is higher in men than women, and higher in the dominant than the non-dominant hand.

Este artículo fue aprobado para publicación en el v68n3 de la Revista de la Facultad de Medicina teniendo en cuenta los conceptos de los pares evaluadores y los cambios realizados por los autores según estos conceptos. Por lo tanto, se publica la versión preliminar del artículo para su consulta y citación provisional, pero debe aclararse que esta puede diferir del documento final, ya que no ha completado las etapas finales del proceso editorial (corrección de estilo, traducción y diagramación) y solo los títulos, datos de autores, palabras clave y resúmenes corresponden a la versión final del artículo.Esta versión puede consultarse, descargarse y citarse según se indique a continuación, pero debe recordarse que el documento final (PDF, HTML y XML) puede ser diferente. Cómo citar:Hernández-Martínez J, Rauch-Gajardo M, Cisterna D, Ramirez-Campillo R, Moran J, Knechtle B, et al. [Efecto del calentamiento en la fuerza de agarre de mano en mujeres sedentarias con sobrepeso]. Rev. Fac. Med. 2020;68(3): In press -2020. English. doi: http://dx.et al. Effect of warm-up on hand grip strength in sedentary and overweight women. Rev. Fac. Med. 2020;68(3): In press -2020. English. doi: Title: Effect of warm-up on hand grip strength in sedentary and overweight women Short title: Warm-up, handgrip strength and overweight Título completo: Efecto del calentamiento en la fuerza de agarre de mano en mujeres sedentarias con sobrepeso Título corto: Calentamiento, fuerza de agarre y sobrepeso.

To examine body composition of Chilean powerlifters according to body mass and sex. Methods: Fifty-six male and female powerlifters were recruited from one national competition. Aside from the official weight categories, males were classified as the lightweight, middleweight, and heavyweight classes. Similarly, females were classified as lightweight and middle-heavyweight classes. Nineteen anthropometric measures were assessed, with lean mass as the main outcome. A one-way ANOVA was used to compare groups. Results: Male lightweight class lifted less (p<0.01) total load (417±30.9 kg) compared to heavier male classes (524±66.7 kg, middleweight; 581±131 kg, heavyweight), and female classes lifted less (p<0.01) total load (221±33.8 kg, lightweight; 254±48.3 kg, middleweight-heavyweight) compared to all male classes. Regarding lean-mass in trunk, arms and legs, total body protein, water, and mineral mass, all male groups had greater (p<0.01) values than the groups of females, while lightweight males had lower (p<0.01) values than the rest of male groups, and heavyweight males had greater (p<0.01) values than the total sample of males (except for legs lean mass, and total bone mineral content). In females, no significant differences were observed between classes, or in total load lifted or in body composition. Conclusion: Heavier male lifters had significantly greater lean mass than lighter athletes. Therefore, powerlifting performance was affected by anthropometric measures, as corroborated by 1-RM scores. However, there was a general lack of differences in body composition between female weight classes, and, as a result, a lack of differences in 1RM performance.

Resumen Durante las últimas décadas, las prácticas de movilidad de los habitantes de Chiloé se han visto influenciadas por la instalación de diversos tipos de infraestructuras, lo cual tiene una repercusión en múltiples esferas sociales, haciendo de la vida cotidiana isleña un campo en tensión entre lo tradicional y lo moderno. La discusión presentada se enmarca en la controversia en torno a la construcción de un puente que unirá el Continente con el Archipiélago de Chiloé, en el sur austral de Chile, bajo el supuesto que esta infraestructura permitirá a sus habitantes mayor movilidad, conectividad y, en consecuencia, mayor acceso al mundo. En términos metodológicos, se realizó un análisis de prensa que exhibe los principales acontecimientos que implican la construcción del puente, para ello se utiliza la categoría controversias con el objetivo de pensar la movilidad. Dentro de los resultados destaca el rol del puente como detonador de narrativas que ponen en el centro de la vida moderna a la movilidad, la sensación de una hipermovilidad como actividad que debe ser desarrollada por la mayoría de la población, las divergencias discursivas respecto a la comprensión de la movilidad y la relevancia de las controversias en las ciudades.

Both, Lean Construction (LC) techniques and Artificial Intelligence (AI) methods strive for the continuous improvement of production systems in projects and organizations. A combined implementation of both approaches is an ongoing research area. Therefore, the question arises as to whether the added value generated by implementing both approaches jointly is greater than the added value generated by implementing them independently and what is the significance of people in their combined use.This paper explores theoretically the potential of synergies between LC and AI in the AEC sector with exemplary use cases as well as their resulting effects. Humans play a crucial role as interface between a combined use of both of them. As a result, a framework containing LC, AI and people is formed as basis for further combined developments. Therefore, change management, an area in which Lean has spent several years developing, can help both approaches gain traction. With the results, targeted applications can be developed, and practice can be supported.

Objetivo: analizar si existe diferencia en la composición corporal por género y si esta influye sobre el rendimiento físico de jugadores de vóleibol adolecentes. Método: se agruparon veinticinco jugadores de vóleibol (Hombres n = 10, Mujeres n = 15). Se midió la composición corporal y potencia muscular mediante la prueba de salto en contra movimiento y remate de balón. Resultados: se observó que los hombres presentaban una mayor masa muscular junto a una menor grasa corporal relacionada a un mayor rendimiento en las pruebas de rendimiento físico. Conclusión: los hombres presentan una mayor masa muscular y menor grasa corporal junto a un mejor rendimiento en las pruebas de potencia muscular.

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