FIELD: medicine, in particular, locomotor system prophylaxis and therapy. SUBSTANCE: apparatus has individual accommodating place including set of bases, support and intermediate units arranged under base between support surfaces and surfaces of base and/or support, which is arranged under base or intermediate unit. Shape and mutual arrangement of constructive members provide for individual's body counterbalancing and self-balancing owing to restricted rotation of base in any or restricted direction around point of contacting with intermediate unit and/or support on reflex movements of spine and pelvis. Apparatus is used for exercising and keeping spine vital tonus in sitting position of individual during resting or working, including in zero gravity state, by exercising of vestibular system and providing stability. EFFECT: increased efficiency in forced resuming of balanced state by individual after deflecting from balanced state generally owing to pelvis and spine movements. 22 cl, 23 dwg
