My dear son, age 13, is going on a ski trip with the school next year. He is a complete ski novice and I'm sure he'll have a good time but I am slightly concerned about his level of general fitness.
He does the normal games and PE at school and walks and cycles quite a bit (but not to a strenuous level, more as a means of getting around). Will this be enough or should he be doing extra? And if so when does he need to start?