Adherence to a rehabilitation programme is vital to recover from injury, failing to do so can keep a promising athlete off the field permanently. Although the importance to follow their home exercise programme (HEP) is broadly explained to patients by their physicians, few of them actually complete it correctly. In my PhD research, I focus on factors that could help increase engagement in home exercise programmes for patients recovering from knee injuries using VR and wearable sensors. This will be done through the gamification of the rehabilitation process, designing the system with a user-centered design approach to test different interactions that could affect the engagement of the users.