A method for generating a rebounding motion between a person and a surface includes the steps of providing a rebounding device, positioning the rear member against the surface and the front member adjacent to an upper body of the person and the surface, and applying pressure to the rebounding device through the upper body. The rebounding device includes front and rear members having front and rear widths spanning right front and rear side edges and left front and rear side edges and first and second spring mechanisms positioned between the front and rear members. The first and second spring mechanisms are positioned between the right front side edge of the front member and the right rear side edge of the rear member and between the left front side edge of the front member and the left rear side edge of the rear member, respectively.

A portable lumbar support and ergonomic chair having a lumbar support. The lumbar support has a seat hingedly coupled to a seat back having a teardrop-shaped lumbar support seat back cushion. A rigid back support portion may be rotated forward about hinges to collapse substantially parallel to the seat frame and backward to open to a variety of angles with respect to the seat frame. The seat back freely pivots around an upper lateral axis, and the rigid back support portion is linearly adjustable to space the seat back toward and away from the hinges to enable raising or lowering the upper lateral axis and thus the seat back with respect to the lower lateral axis. This provides multiple ways of changing which part of the teardrop-shaped lumbar support curve hits your lumbar curve for proper support. Variable lumbar lordotic support is thus provided.

A backrest having features that support proper sitting posture of a user to improve back health and posture may be utilized. The backrest may include a front wall with wings extending to the left and right and diagonally forward to reduce Kyphosis of a user when sitting against the backrest. A combination of the front wall and wings may causing the user's (i) back ribs to be raised and gently tilted forward and (ii) thoracic spine region to be gently thrusted forward. By thrusting the thoracic spine region and raising and tilting the back ribs, a user's abdominal cavity may be expanded, and thereby reinforcing the ideal positioning of the cervical spine so that the user's head naturally positions on axis and does not “dump” forward.

There is provided a tactile presentation device capable of realizing easier wearing/removal and contact of a tactile stimulation unit in an appropriate position. The tactile presentation device is provided with an attaching unit to a back plate of a chair, and a wearing belt portion to a body provided so as to be extendable and contractable on the attaching unit, in which one or more first tactile stimulation units are provided on the attaching unit, and one or more second tactile stimulation units are provided on the wearing belt portion.

The invention relates to outdoor furniture having a seat cushion having a cover material on the bottom and back sides so that the seat cushion that can be turned over and flipped front to back to protect the cushion from weather outdoors. The frame includes a seat pan support for supporting a seat assembly. The seat cushion assembly has a cushioned first surface and a covered second surface. In use, the seat cushion assembly may be configured for protection or may be configured for seating by a user by flipping the seat cushion assembly over and by flipping the seat cushion assembly from front to back.

A pillow may include a first arm and a second arm, and a connecting portion may be connected to the first arm and the second arm. The connecting portion may be sized and configured to allow the first arm and second arm to move independently. For example, the first arm may be rotatable relative to the connecting portion by at least about 30°, at least about 45°, at least about 60°, at least about 75°, at least about 90°, or more. The second arm may be rotatable relative to the connecting portion by at least about 30°, at least about 45°, at least about 60°, at least about 75°, at least about 90°, or more.

A backrest having features that support proper sitting posture of a user to improve back health and posture may be utilized. The backrest may include a front wall with wings extending to the left and right and diagonally forward to reduce Kyphosis of a user when sitting against the backrest. A combination of the front wall and wings may causing the user's (i) back ribs to be raised and gently tilted forward and (ii) thoracic spine region to be gently thrusted forward. By thrusting the thoracic spine region and raising and tilting the back ribs, a user's abdominal cavity may be expanded, and thereby reinforcing the ideal positioning of the cervical spine so that the user's head naturally positions on axis and does not “dump” forward.

A rebounding device includes a front member, a rear member, and a spring mechanism including a first biasing element and force adjustment assembly. The force adjustment assembly includes a spring element including a front planar surface and a rear planar surface connected at a rounded portion, wherein the front planar surface contacts an inner surface of the front member; a screw housing secured to an inner surface of the rear member, wherein the screw housing includes a longitudinal channel and a bore on an upper surface; a drive screw positioned through the bore and along the longitudinal channel of the screw housing; a threaded block positioned within the longitudinal channel of the screw housing, wherein the threaded block is configured to move vertically along the longitudinal channel, and wherein the rear planar surface of the spring element is secured to the threaded block.

A buttocks elevating auxiliary seat cushioning system includes a chair having a seat and a backrest that is attached to and extends upwardly from the seat. The seat has an upper surface angled downwardly toward the backrest. A cushion assembly is positioned on the upper surface of the seat and abuts the backrest. The cushioning assembly has a top side, a front side, a rear side, a first lateral side, a second lateral side and a bottom side. The top side is angled upwardly from the front side to the rear side when the bottom side is abutted against the seat and the rear side is abutted against the backrest. The cushion assembly is resiliently compressible.

The present invention relates to a lumbar support for fastening to a backrest of a seat, comprising or consisting of a lumbar support body and a fastening strap fastened to at least two points on the lumbar support body, the fastening strap being of substantially inelastic form in a bracing direction, and the bracing length of the fastening strap being adjustable using at least one bracing means. The invention furthermore relates to the use of the lumbar support according to the invention with a backrest of a seat.