A back manipulator comprises a plurality of spaced support segments (12 to 26) supported for rotation about a common axis by a shaft (28). The support segments are arranged in a group (34) of lumbar support segments and a group (36) of pelvic support segments. The lumbar support segments have spaced back-engaging regions (42) designed to engage the muscles in the back to either side of the spine. The pelvic support segments have a concave back-engaging region (48) to provide a dished or relieved area to receive the sacral region of the user. In use a user places the back manipulator on the floor beneath the lower back to support the pelvic and lumbar regions. The user then raises their knees and rocks them in a latero-medial plane such that the support segments manipulate and massage the contacting areas of the back.
