Part A: The user holding device includes a holding layer and a turn assist layer below the holding layer. The turn assist layer includes a left array of two or more turn assist members distributed in the vertical direction and a right array of two or more turn assist members distributed in the vertical direction. The user-holding device in response to at least one user command inflates the selected one at least one turn assist member in the left and right arrangements and then contracts a subset of the plurality of turn assist members. A controller configured as described above is also included. A related method of providing access to a mattress user and / or a target area of the mattress itself includes inflating a selected one at least one turn assist member in a left and right arrangement, and thereafter at least one Contracting the subset of turn assist members. Part B: A user holding device, such as a mattress, includes a turn assist layer that includes a left array of two or more turn assist members distributed in the longitudinal direction. Each member of the array comprises one or more turn assist bags distributed in the longitudinal direction. At least two of the array members are spaced apart from each other in the longitudinal direction by an arrival space between the left members having a left inter-member dimension. The user holding device also includes a similar right array of turn assist members. A related method of providing access to the target area of a mattress or mattress user is to provide a lateral change in height that increases as the inflated zone increases lateral distance from the centerline of the user-holding device. As shown, the method includes inflating at least one turn assist zone and maintaining the inflated assist zone inflated for a user determined time. Part C: The mattress comprises left and right rotating effectors, a retaining layer on the rotating effector, and left and right auxiliary pillows adjacent to the left and right
