A new and useful device for assisting and training the hyperextension of plantar flexion of the ankle which can be operated by a single user, is easy to use, allows for variable adjustment of the angle of plantar flexion, is handheld, and can be used in a variety of applications and physical disciplines. This device is believed to be useful in the athletic and physical arts disciplines such as ballet. The device comprises a handle that is rotationally connected to a plantar attachment by way of a central axis rod. When connected together, the plantar attachment rotates around the central axis rod, thereby creating angles relative to the handle. The device can be locked into a desired angle by the insertion of a locking pin prior to use. The user places her foot on the sole portion of the plantar attachment, fixes an attaching means around her foot, and places her heel into a calcaneal well on the handle. Finally with the device attached to the foot, the user extends her leg and gently flexes the ankle by moving the handle of the device toward and away from the leg as needed. Over time the users ankle will become more flexible and strong, thereby allowing proper pointe technique, alignment of the foot and minimizing injury.