Modelo multivariable para la planificación del entrenamiento en fútbol profesional / Multivariable Training Planning Model in Professional Soccer

El objetivo de este estudio fue describir un modelo multivariable de planificación del entrenamiento para la monitorización semanal y su periodización en relación con el perfil dinámico competitivo. Veintidós futbolistas profesionales participaron este estudio. Se analizaron 30 microciclos competitivos donde se registró individualmente todas las sesiones de entrenamiento y partidos de competición mediante GPS. Los resultados mostraron una fase de carga con valores cercanos a los alcanzados en competición, pero con estímulos diferenciados en días consecutivos, y otra fase de reducción de la carga en forma de tapering previa a la competición. La carga acumulada semanalmente mostró poca variabilidad entre los microciclos, observándose un promedio de 0.6%. La gestión dinámica de la carga presentó una ratio A:C que osciló entre 0.89-1.13. El modelo multivariable para la planificación del entrenamiento semanal es un método eficaz para monitorizar la carga del entrenamiento en relación con el perfil de rendimiento. (AU)

The aim of this study was to describe a multivariable training planning model for weekly monitoring and its periodization in relation to the dynamic competitive profile. Twenty-two professional soccer players participated in this study. Thirty competitive microcycles were analyzed. Thirty competitive microcycles were recorded individually in all training sessions and competition matches through a GPS device. The results showed a loading phase with values close to those achieved in competition, but with differentiated stimuli on consecutive days, and another phase of load reduction in the form of tapering prior to competition. The weekly accumulated load showed little variability between the microcycles; an average of 0.6% was observed. Dynamic load management presented an A: C ratio that ranged from 0.89-1.13. It can be concluded that the multivariate model for planning weekly training is an effective method to monitor training load in relation to performance profile. (AU)

[Tarnishing, discoloration and corrosion of dental amalgams in vitro]. / Deslustre, pigmentación y corrosión de las amalgamas dentales in vitro.

The purpose of this paper was to observe changes occurred on the surface of some amalgams commonly found in the national market in order to evaluate tarnishing, darkening and corrosion on polished and non-polished surfaces. The method used was alternate immersion in bidestilled water, and 50% acetic acid, 14.5% lactic acid. A control, for comparative purposes, was not submitted to immersion but left in normal environmental conditions.