Patent ID: 8052583

Claim:
A swivel exerciser comprising: a base comprising two spaced front legs, a rear leg, a head tube and a longitudinal member, with a foot disposed on a bottom end of the head tube and two spaced hand grips disposed on a top end of the head tub, wherein the base is elevated by each of the two spaced front legs, the rear leg and the foot; a sector-shaped plate disposed on a top of the base and comprising two central pivot members, with the longitudinal member extending from a front portion of the sector-shaped plate, with the head tube secured to the longitudinal member, with the two spaced front legs extending below the sector-shaped plate and located on opposite sides of the longitudinal member, with the two spaced front legs spaced from the longitudinal member and spaced from the head tube; a curved rail disposed around a curved edge of the sector-shaped plate, with the curved rail being fixedly secured to the top of the base; two pivotal arms rearward splayed out of the two central pivot members respectively; a knee plate disposed on an end of each pivotal arm distal the pivot member and comprising a wheel disposed on the curved rail and adapted to move therealong; a projection disposed at a joining portion of each pivotal arm and each knee plate and comprising a through hole; and an inverted U-shaped bridge member, wherein in a first operation mode, both ends of the inverted U-shaped bridge member are inserted into the through holes to interconnect the projections so that the knee plates can rotate as a whole; and wherein in a second operation mode, the projections are not connected by the inverted U-shaped bridge member so that one knee plate can rotate independently of the other knee plate.