Meditation in the seated position with both knees flat on the floor is enhanced by a tapered seat that is provided with at least one recess to accomodate a heel. The taper of the support is downwardly toward the heel recess, thereby encouraging the meditator to sit erect with much of the weight felt on the knees. Sloping downward projections from the seat that extend under the thighs serve to distribute the weight and reduce any problem of circulation in the legs.

A chiropractic device having front and rear portions, a central semi-circular raised portion extending upwardly from the upper surface of the device and notches formed in the sides of the front portion of the device. A patient rests his or her torso on the device by placing his or her sternum on the central semi-circular raised portion of the device. The device has first and second sides, each side having a front side portion, a middle slanted side portion extending outwardly from the front side portion to define a notch in the front portion of the device, and a rear side portion. The patient's arms are accommodated by the notches formed in the sides of the front portion of the device. The central raised portion places the patient in a superior position for treatment and protects the patient's chest from being pressed against the upper surface of the device during treatment.

The device is preferably constructed in the form of a V-shaped buttocks support that may be used on a table or the like for support in a seated position, or on the floor for support in a supine position. From the vertex of the support each leg thereof is similarly contoured with high and low sections, including a high point at the vertex, to enable use of the device, by direct body contact therewith, in different body positions. In either seated or supine positions, the user can direct his or her body weight to various buttocks muscles with the assistance of leg motion to open and close the legs and thus direct contact with the device to different muscle areas. Thus, muscle contraction exercises can be performed with the legs in a stationary position to provide a toning and firming of the exercised muscles.

A seat structure for use by a baby, for example in a carriage, equipped with a seat (1) having a seat portion (2) and a back rest portion (3), arranged for preventing a dislocation of a hip joint of a baby. The seat portion (2) has a surface configuration (8) which allows such a size (Wf) as to avoid the presence of obstacles which would inwardly urge the outer sides of the kneecaps of the baby seated with a crotch distance (W) which is maintained at a predetermined value for preventing the dislocation of a hip joint. The seat (1) has a pair of step portions (10) for the transverse positioning of the hips of the baby placed on the seat portion (2). Further, a projection (11) for positively keeping the crotch distance (W) of the baby is provided on the front portion of the seat portion (2), the projection (11) being positioned at the crotch of the sitting baby.

Chair for a straight sitting position of the user with crossed legs (yoga position). The chair as characterized according to the invention has a seat raised on both sides, which is wider towards the front and adapted to the contour of the body resulting from the crossed legs of the user. In the back area of the seat a central elevation is provided which forms an extension of the user's coccyx. The chair's back rest surface has a protrusion located approximately in the area of the fourth and fifth lumbar vertebrae of the user. The seat adapts to the contour of the body which contour results from the crossed legs of the user.