As often in entrepreneurship, the idea of BlueBack was born from a personal story. The story of a young woman who at the age of twenty, was forbidden to practice sports because of back pain. After a long medical journey (specialized doctor, specialized rehabilitation center...), the real cause of the pathology is not treatable unless the resumption of a regular physical activity with as a precondition: to strengthen the back. The prerequisite is to strengthen the posture and the deep muscles. Accompanied by a physiotherapist, she discovers the rehabilitation of deep muscles and understands the how difficult it was to feel them, and to work them. And the keystone of this learning ? The physiotherapist.