Conclusion: the test-retest reliability of strength testing is good in the elbow of young people, and correlation of the elbow flexor is better than elbow extensor.

Objective: to provide anatomic materials for reconstruction of function of flexing elbow joint by the transposition of flexor carpi ulnaris for clinical practices.

For example, the bicepes muscle in the front of the upper arm is a flexor. When this muscle contracts, the elbow bends and the forearm and hand move toward the shoulder.