Abstract: A training apparatus (1) which includes, in a position of use, a movable platform (2) for a person (9) who is to train a muscle which is moving a body joint training, the training apparatus (1) including at least one transmission device (4) with an associated rotatable manoeuvring element (45) which is arranged to be able to move the platform (2), the person (9) and the transmission device (4) in a direction which has a vertical directional component along at least one supporting element (3), as the manoeuvring element (45) is operated.