Supporting module for an adaptive sleep system, comprising: - a first, uppermost supporting element; - at least two drive shafts (140, 140'), the drive shafts (140, 140') being situated in a plane parallel with respect to the first supporting element; - at least two leaf springs (130, 130') configured to have an adaptable deformation resistance, and being positioned parallel to one another, each leaf spring (130, 130') including a first and a second end, each first end being connected to the first supporting element, and each leaf spring (130, 130') being in contact with an adjacent drive shaft (140, 140') via a coupling element (150, 150'), wherein the position of a contact point between the leaf spring (130, 130') and the adjacent drive shaft (140, 140') along the length of the leaf spring (130, 130') determines the deformation resistance of this leaf spring (130, 130'), and wherein the coupling element (150, 150') has been configured to transmit the rotational motion of at least one drive shaft (140, 140') to the leaf spring (130, 130'), in order to change the position of the contact point between the leaf spring (130, 130') and the adjacent drive shaft (140, 140') along the length of the leaf spring (130, 130'). - a first, uppermost supporting element; - at least two drive shafts (140, 140'), the drive shafts (140, 140') being situated in a plane parallel with respect to the first supporting element; - at least two leaf springs (130, 130') configured to have an adaptable deformation resistance, and being positioned parallel to one another, each leaf spring (130, 130') including a first and a second end, each first end being connected to the first supporting element, and each leaf spring (130, 130') being in contact with an adjacent drive shaft (140, 140') via a coupling element (150, 150'), wherein the position of a contact point between the leaf spring (130, 130') and the adjacent drive shaft (140, 140') along the length of the leaf spring (130, 130') determines the deformation resistance of this leaf spring (130, 130'), and wherein the coupling element (150, 150') has been configured to transmit the rotational motion of at least one drive shaft (140, 140') to the leaf spring (130, 130'), in order to change the position of the contact point between the leaf spring (130, 130') and the adjacent drive shaft (140, 140') along the length of the leaf spring (130, 130'). a first and a second end, each first end being connected to the first supporting element, and each leaf spring (130, 130') being in contact with an adjacent drive shaft (140, 140') via a coupling element (150, 150'), wherein the position of a contact point between the leaf spring (130, 130') and the adjacent drive shaft (140, 140') along the length of the leaf spring (130, 130') determines the deformation resistance of this leaf spring (130, 130'), and wherein the coupling element (150, 150') has been configured to transmit the rotational motion of at least one drive shaft (140, 140') to the leaf spring (130, 130'), in order to change the position of the contact point between the leaf spring (130, 130') and the adjacent drive shaft (140, 140') along the length of the leaf spring (130, 130').