反向曲腕。

Reverse wrist curls.

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作为一个规律，初级和中级选手都会有不好的抓水技术，有沉肘，沉腕的手部姿势，很少有曲肘的。

As a rule, beginner and intermediate swimmers have very poor catches with dropped elbows, dropped wrist hand positions and very little elbow bend.

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形像就是外形要像猴子，如耸肩、缩颈、圆背、束身、弯肘、垂腕、曲膝等。

Similar image means that the appearance must resemble monkeys, such as shrugging, shrinking necking, round back, recoil, bending elbow, vertical wrist, lower the knees, and so on.

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