Currently, some physical therapy requires another person to assist in exercises that rehabilitate patients with leg injuries such as sprains and fractures. In this paper, we propose a device that can help strengthen muscles that have weakened due to injury without the help of another person. The device is portable and can be used in a home setting, and the amount of resistance it provides can be adjusted by the patient. We suggest a design that aids patients in lower leg rehabilitation and can adjust for the patient’s preference in exercise type and intensity.