Wearable assistive jamming apparatus and related methods are disclosed herein. An example apparatus includes a frame to be worn about a body part of a user and a jamming actuator carried by the frame. The example apparatus includes an electrode to deliver electricity from an electrical source communicatively coupled to the electrode to a muscle of the user. In the example apparatus, the jamming actuator is to transition from a flexible state to a substantially rigid state in coordination with the delivery of the electricity to the electrode to support the body part.