正如多数研究所提到的拉力螺钉的一个主要优点是反向滑动机制，能在负重条件下对骨折施加控制性加压，促进骨折的愈合。
As it is mentioned in many studies that one major advantage of the backward sliding mechanism of lag screw is controlled compression of fracture with weight bearing which helps in healing of fracture.
反向屈腕：找个地方坐下，将拉力绳在双脚缠绕两圈。
Reverse Wrist Curls: In a seated position, wrap the band twice around the feet.
反向屈腕：找个地方坐下，将拉力绳在双脚缠绕两圈。
Reverse Wrist Curls: In a seated position, wrap the band twice around the feet.
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