It was initially scuba diving, which led him to go beyond technique to enter the field of sports psychology. Scuba diving at a committed level of risk-taking (depths greater than 100 m) makes him aware of the importance of the mental dimension of this practice.

Sylvain therefore resumed the path of training in sports psychology, in order to model and be able to teach techniques that he had started by experimenting on himself. It seems all the more important today, in the realm of the mind, to have already felt what one teaches others.