| http://www.w3.org/ns/prov#value | - An exercise device according to claim 1 further comprising a pair of parallel plates fixed to said tracks, each of said plates including two end portions each having a flange formed thereon, a catch formed in each of said flanges, a head rotatably secured to each of said flanges and including an extension extended therefrom for engagement with the respective catch, a leg fixed to each of said head
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