An exercise machine including an adjustable joint with a first part and a second part that are shaped to rotate with respect to each other such that when an orientation between the first part and the second part changes, a position of the user contact feature also changes. The machine also includes a locking mechanism that is positioned to secure the first part and the second part together. The locking mechanism being positioned to secure the first part and the second part in an axial locking direction and to release the first part from the second part in an axial release direction. When the first part and the second part are secured, at least two first part features are interlocked with at least two second part features simultaneously.