Abstract: A personal exercise device comprises a user interface to be moved by a user in a 3-dimensional space when using the device, a resistance mechanism to generate a force, a cable coupled between the user interface and the resistance mechanism to transmit the force from the resistance mechanism to the user interface, one or more sensors configured to detect movement of the user in the 3-dimensional space when using the device, a feedback device; and a controller in communication with the one or more sensors. The controller is configured to estimate a user specific body structure for the user, determine a user specific target movement for the user based on the user's body structure, determine an actual movement of the user when using the device to perform an exercise based on one or more outputs from the one or more sensors, and provide feedback to the user via the feedback device based on a comparison between the user's actual movement and the user specific target movement.

Abstract: A personal exercise device with a cable and resistance mechanism comprises a sensor arrangement configured to detect two orthogonal angles to define a trajectory of the cable extending in the 3-dimensional space during use. The sensor arrangement comprises a pulley to direct the cable as it extends from the device during use, a cable follower through which the cable passes, the cable follower pivotally mounted to pivot about a first pivot axis and about a second pivot axis, the second pivot axis orthogonal to the first pivot axis, and wherein the first pivot axis is collinear with a rotational axis of the pulley, and one or more sensors configured to detect pivoting of the cable follower about the first and second pivot axes and provide one or more outputs indicative of the two orthogonal angles to define the trajectory of the cable extending in the 3-dimensional space.