Relación entre la carga interna y externa en árbitros de baloncesto / Relationship between External and Internal Load in Basketball Referees

El objetivo del presente trabajo consistió en analizar las relaciones existentes entre los parámetros de carga interna (objetiva y subjetiva) y externa. La muestra estuvo compuesta por un total de 15 partidos disputados en el Eurobasket femenino U-16, donde participaron un total de nueve árbitros (6 masculinos y 3 femeninos). Las variables analizadas de carga interna fueron la frecuencia cardiaca y la percepción subjetiva de esfuerzo. Las variables de carga externa se dividieron en cinemáticas y neuromusculares, medidas a través de dispositivos inerciales. Los resultados explican que existen relaciones entre los valores de carga interna objetiva y carga externa, así como entre las variables de carga externa. En cambio, no existen relaciones entre la carga interna subjetiva y las variables de carga interna y externa objetiva, exceptuando el PowerMetabolic. Estos resultados demuestran que la competición y el nivel de los árbitros influyen en gran medida en las variables subjetivas. (AU)

The aim of the present paper consists in analysing the relations between internal (objective and subjective) and external load parameters. The sample was composed of a total of 15 matches played in the women’s U16 Eurobasket championship, in which a total of nine referees (6 men and 3 women) participated. The internal load variables analysed were heart rate and the subjective rating of perceived exertion. The external load variables were divided into kinematic and neuromuscular variables, measured using inertial devices. The results show that there are associations between the values of objective internal load and external load, as well as between the variables of external load. In contrast, there is no relation between internal subjective load and the variables of objective internal and external load, except regarding Metabolic Power. These results indicate that the competition and the level of the referees greatly influence the subjective variables. (AU)

HO-1 polymorphism as a genetic determinant behind the malaria resistance afforded by haemolytic disorders.

Malaria affects thousands of people around the world representing a critical issue regarding health policies in tropical countries. Similarly, also haemolytic diseases such as sickle cell disease and thalassemias are a concern in different parts of the globe. It is well established that haemolytic diseases, such as sickle cell disease (SCD) and thalassemias, represent a resistance factor to malaria, which explains the high frequencies of such genetic variants in malaria endemic areas. In this context, it has been shown that the rate limiting enzyme heme oxygenase I (HO-1), responsible for the catabolism of the free heme in the body, is an important resistance factor in malaria and is also important in the physiopathology of haemolytic diseases. Here, we suggest that allelic variants of HO-1, which display significant differences in terms of protein expression, have been selected in endemic malaria areas since the HO-1 enzyme can enhance the protection against malaria conferred by haemolytic diseases This protection apply mainly in what concerns protection against severe malaria forms. Therefore, HO-1 genotyping would be fundamental to determine resistance of a given individual to lethal forms of malaria as well as to common clinical complications typical to haemolytic diseases and would be helpful in the establishment of public health politics.