| 摘要 |
An exercise machine includes an anchorage adapted to fit on the upper edge of a room door, a lower anchorage adapted to fit on the lower edge of the door, and an operating mechanism trained between the two anchorages. The mechanism includes an elastic resistance device and a variable length connector between the resistance device and a variable length connector between the resistance device and one of the anchorages. A flexible tension element extends around a pulley system within the variable length connector and out of the connector to an external handgrip. The handgrip can be pulled to stress the elastic resistance device.
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