A functional office chair is provided, which allows users to perform exercise movements without going to the gym, and in which the range of motion of the exercise performed while exercising can be freely adjusted. The functional office chair includes a lower body, an upper body, telescopic rear force arms and front force arms, a connection section, a side bar, a T-bar, and armrests.

A chair exercise apparatus has a frame, an inverted Y shaped seat support member fastened to an upper portion of the frame, a seat fastened to an upper end of the seat support, and a pair of parallel arms each having a proximal end extending toward the frame and a foot support fastened to a distal end of each arm. Each arm is biased upward away from the frame. A pair of hinged support post members is fastened to a mounting bracket captured between the seat and the upper end of the inverted Y shaped seat support and each is movable from a storage position below an upper surface of the seat to an operable position extending upward alongside the seat and each member is releasably captured in the operable position by a clamp formed between the short leg and its end portion of the mounting bracket.

The present disclosure provides a movable ball chair, including an elastic ball and a support frame, wherein the support frame includes a plurality of connecting tubes bent downward and a plurality of supporting tubes bent upward, the supporting tubes and adjacent connecting tubes are connected end to end to form a three-dimensional closed loop in a manner that the included angles between planes of the supporting tubes and the planes of the adjacent connecting tubes are the same, the bottom of each supporting tube is provided with a connecting hole, the central axis L of the connecting hole is inclined from top to bottom toward the direction where the central axis L0 of the elastic ball in the vertical direction is located, the included angle between the central axis L of the connecting hole and the straight line Y is a, the value range of a is 0.25-5, a sleeve assembly is welded to the interior of the connecting hole, the outside diameter of the sleeve assembly is matched with the inside diameter of the connecting hole, the sleeve assembly is provided with a through hole, the sleeve assembly is connected to a moving piece through the through hole, and the through hole, the sleeve assembly and the connecting hole are arranged coaxially. Free movement of the ball chair is achieved by the movable ball chair described in the present disclosure, and the movable ball chair has the advantages of simple and stable structure.

A chair exercise apparatus has a frame, an inverted Y shaped seat support member fastened to an upper portion of the frame, a seat fastened to an upper end of the seat support, and a pair of parallel arms each having a proximal end extending toward the frame and a foot support fastened to a distal end of each arm. Each arm is biased upward away from the frame. A pair of hinged support post members is fastened to a mounting bracket captured between the seat and the upper end of the inverted Y shaped seat support and each is movable from a storage position below an upper surface of the seat to an operable position extending upward alongside the seat and each member is releasably captured in the operable position by a clamp formed between the short leg and its end portion of the mounting bracket.