Bath for exercising, the bath containing substantially vertical wall portion, and a suitably configured bath bottom, from which extends an exercise base, wherein the bath bottom is formed so that the bath is the deepest in the area where the person lying on the exercise base reaches when moving her legs, the bath is lower in the area where she reaches when moving her arms, wherein the bath bottom is shaped so that in the top view it follows the trajectory of the user can reach when moving her limbs.