The pedal comprises a base (1) on which to place a user's foot and a transverse hole (8) for a rotation shaft, characterised in that it comprises at least one element (4) which is less dense than water arranged above said transverse hole (8) for a rotation shaft. It makes it possible for the base on which the foot is placed to always remain in an optimal position when the device is placed in water and before the user places his or her foot thereon, allowing comfortable placement of the foot.
