What does sisu mean?

SISU - persistence, tenacious willpower, unrelenting energy, indomitability, unyieldingness, boldness and courage.
Understanding sisu is all about realizing that all obstacles can be overcome.

Bootcamp

A short-term, intensive training program in which the participant plans and quickly achieves a certain goal. Aimed at a specific goal, such as fitness, learning new skills, building team spirit or career development. In short, to promote well-being in different ways. An effective way to achieve goals and take a new step in different areas of life.