A seat includes a support having a first coupling hole and a second coupling hole disposed therein. The seat also includes a seat cradle having a back, a bottom, a first side fixedly connected to the back and the bottom, and a second side fixedly connected to the back and the bottom. The seat cradle has a neutral position in which a top portion of the back is positioned forward of a bottom portion of the back, and a rear portion of the bottom is positioned below a forward position of the bottom. The seat also has a first cradle coupler extending from the first side of the seat cradle, such that the first cradle coupler cannot rotate with respect to the first side. The seat further includes a second cradle coupler extending from the second side of the seat cradle, such that the second cradle coupler cannot rotate with respect to the second side. The first cradle coupler is received in the first coupling hole and the second cradle coupler is received in the second coupling hole.

A seating arrangement includes a base member, and an integrally formed support member coupled to the base member and supporting a seat moveable from an upright position to a reclined position, wherein a portion of the support member is bendable as the seat moves from the upright position to the reclined position such that a first side of the support member is put in tension and a second side generally opposite the first side is put in compression, and wherein the first side includes a tensile substrate so that the first side has as higher modulus of elasticity than the second side.

A seating arrangement includes a base member, and an integrally formed support member coupled to the base member and supporting a seat moveable from an upright position to a reclined position, wherein a portion of the support member is bendable as the seat moves from the upright position to the reclined position such that a first side of the support member is put in tension and a second side generally opposite the first side is put in compression, and wherein the first side includes a tensile substrate so that the first side has as higher modulus of elasticity than the second side.

A double shell seat includes a base for resting on a floor, an outer shell supported by the base, and an inner shell movably supported within the outer shell. The inner shell has a seat support, a backrest support, and a hinge between the seat support and the backrest support. The inner shell is movable with respect to the outer shell from an upright condition in which the seat support has a position toward the rear of the outer shell, the backrest support has a position that is relatively vertical, and the hinge is at a first angle, to a reclined condition in which the seat support is forward of its position in the upright condition, the backrest support is less vertical than its position in the upright condition, and the hinge is open at a greater angle than the first angle. The seat is preferably free of coil springs.

A double shell seat includes a base for resting on a floor, an outer shell supported by the base, and an inner shell movably supported within the outer shell. The inner shell has a seat support, a backrest support, and a hinge between the seat support and the backrest support. The inner shell is movable with respect to the outer shell from an upright condition in which the seat support has a position toward the rear of the outer shell, the backrest support has a position that is relatively vertical, and the hinge is at a first angle, to a reclined condition in which the seat support is forward of its position in the upright condition, the backrest support is less vertical than its position in the upright condition, and the hinge is open at a greater angle than the first angle. The seat is preferably free of coil springs.

A collapsible chair is provided, including a seat frame tube, and a support bracket having a mirror structure, wherein the support bracket including a first front leg tube, a second front leg tube, a rear leg tube, and a connecting plate, a top end of the first front leg tube is hinged with an upper portion of the seat frame tube, a bottom end of the first front leg tube is hinged with the top end of the second front leg tube, a top end of the rear leg tube and one end of the connecting plate are hinged with a lower portion of the seat frame tube, and a hinge portion of the first front leg tube and the second front leg tube is slidable along the connecting plate, and the second front leg tube is hinged with the rear leg tube at a certain position.

A collapsible chair is provided, including a seat frame tube, and a support bracket having a mirror structure, wherein the support bracket including a first front leg tube, a second front leg tube, a rear leg tube, and a connecting plate, a top end of the first front leg tube is hinged with an upper portion of the seat frame tube, a bottom end of the first front leg tube is hinged with the top end of the second front leg tube, a top end of the rear leg tube and one end of the connecting plate are hinged with a lower portion of the seat frame tube, and a hinge portion of the first front leg tube and the second front leg tube is slidable along the connecting plate, and the second front leg tube is hinged with the rear leg tube at a certain position.

A fitness device is provided, the fitness device comprising: a spheroidal member having an interior cavity, the spheroidal member comprising a cylindrical portion extending between a first hemispherical endcap and a second hemispherical endcap, wherein a surface of the spheroidal member defines an aperture positioned between the interior cavity and an exterior of the spheroidal member; and a structured surface positioned on the surface of the spheroidal member over the aperture, the structured surface extending into the interior cavity of the spheroidal member.

A sport chair includes a seating surface operative to support a user and a processor. The processor is configured to detect the presence of a user on the seating surface, establish communication with an article of apparel on the body of the user, receive an indication of a physiological parameter of the user from a biometric sensor provided with the article of apparel, and output the physiological parameter to a display.

A sport chair includes a seating surface operative to support a user and a processor. The processor is configured to detect the presence of a user on the seating surface, establish communication with an article of apparel on the body of the user, receive an indication of a physiological parameter of the user from a biometric sensor provided with the article of apparel, and output the physiological parameter to a display.