Abstract: A chair is intended to serve in the health-improvement medicinal field and refers to the training devices for spinal diseases prevention and treatment. The present chair includes a base, a seat, connected with said base, a device for turning of said seat in horizontal flatness and inclining in vertical flatness. Besides, the chair includes the device for the seat height regulation and the device for seat incline (swing amplitude) regulation in vertical flatness. The chair has additional device for turn-over the seat, which allows folding this chair in a portable position and to wide a possible sphere of usage (places of work or places of rest).

Abstract: An armchair includes a base with a seat placed upon it, a backrest, the arm rest, and a feet platform with adjustable feet fixation limiters. Said seat is able to turn in horizontal flatness and to regulate its height. Said backrest includes at least two back supports, which are independent and can be regulated and fixated in the vertical and horizontal directions. The seat belt attached to the backrest is supposed to fixate the correct torso positioning of the user's spine relatively to the armchair backrest. The arm supports (elbow-rests) are connected with the armchair seat and are regulated in the desired height and incline in vertical flatness. The feet, platform is attached to the base and equipped with the adjustable feet limiters to keep the user's feet from moving during his/her seat turning.