Abstract: A body positioning feedback apparatus is securable to a foot or other body part for which it is beneficial to ensure proper alignment between body parts. The body positioning feedback apparatus may be implemented as a mechanical device or as an electronic device that provides visual, audio, and/or tactile feedback when the user is employing improper form. As a particular non-limiting example, the body positioning feedback apparatus can be used to assist users in performing stationary or walking lunges and single-legged and two-legged squats.

Abstract: A system of extendable members and connectors can be used to model three-dimensional objects, such as furniture. The members and connectors may be arranged to approximate the shape and dimensions of a piece of furniture. In this way, a user of the system can visualize how well the furniture modeled by the system would fit in a space, such as a room. The disclosed embodiments may facilitate three-dimensional visualization of how furniture or other objects will fit in a room or other space. Further, the system may be disassembled easily for transportation and storage.

Abstract: A body positioning feedback apparatus is securable to a foot or other body part for which it is beneficial to ensure proper alignment between body parts. The body positioning feedback apparatus may be implemented as a mechanical device or as an electronic device that provides visual, audio, and/or tactile feedback when the user is employing improper form. As a particular non-limiting example, the body positioning feedback apparatus can be used to assist users in performing stationary or walking lunges and single-legged and two-legged squats.