Editorial

Racquet sports continue an unstoppable rise in the sporting world in many aspects, such as the number of players, events and, of course, scientific research. This rise has to do with the increase in the sporting life of great players; which, in turn, is a product of the growth of scientific literature and its application to training. In this sense, we can cite as an example the current retirement of Roger Federer at the age of 41, a fact that a few decades ago would have been unlikely. And it is not the only case since the Spaniard Rafael Nadal continues to win titles despite his advanced age for sport.