| 摘要 |
<p>A waist and hip developer includes a track curving smoothly upwardly toward two distal ends thereof and having two stop members respectively 5 located at two distal ends thereof, foot members affixed to the track for supporting the track on the floor steadily, a slide slidably coupled to the track with rollers thereof and movable back and forth along the track between the stop members, a seat rotatably supported on the slide with a ball bearing within a predetermined angle and selectively lockable to the slide with a lock 0 screw, two grips respectively affixed to the two distal ends of the track, and a counter for counting of the number of reciprocating cycles of the slide moving by the user sitting on the seat. '5</p> |
