The Kettlebell is widely used during the Trojan Workout of Martijn Bos. This Trojan Workout which is invented by Martijn Bos himself creates a cardiovascular stimulant in the body, with the result that the cardiovascular system also improves during the strength training.

Martijn is a highly skilled and concerned (Krav Maga, MMA, RKC) instructor, who is always looking for innovation and improvement in training so that the wel-being of the members of Trainingscentrum Helena is guaranteed.