Abstract: A method and apparatus for training a user to move in a desired movement pattern, especially for training a golfer to swing a golf club. One or more sensors are placed adjacent the user, for example pressure sensors under the user's feet and/or between the user's hands and a golf club. The sensors generate signals corresponding to the user's movement. A comparator and signal generator are used to compare a function of the user signals and a reference value, and to generate training signals which are communicated to the user, e.g. by radio frequency signals received by a headset worn by the user. In this way, the user senses, during the actual movement, training signals which represent a relationship between the actual movement pattern and a desired movement pattern.

Abstract: Spine motion analyzer and method in which a self-aligning measurement linkage is attached to the subject above and below the portion of the spine in which motion is to be monitored. Mounts are provided for attaching the ends of the linkage in fixed positions near the sacrum, beneath the scapulae, and on the head for monitoring either lumbar motion or cervical motion. The linkage has a plurality of arms which move relative to each other in accordance with movement of the spine between the points to which the linkage is attached, and transducers connected to the linkage arms provide electrical signals which can be processed to provide video, printed and/or auditory indications of the spinal movements. One embodiment, which is particularly adapted for sports testing such as golf swing analysis includes a transducer such as a gyroscope which permits measurements to be taken with respect to an absolute or fixed reference such as the ground.

Abstract: A sports training aid has a pair of foot sensors, insertable in a pair of shoes, which generate measurement signals indicative of weight applied to each of the foot sensors. The training aid compares the measurement signals with a specified range of values and produces audible sounds indicative of the relationship between those measurement signals and the specified range of values, thereby providing the training aid's user with immediate audible feedback regarding weight shifts. A grip sensing version of the sports training aid uses a grip pressure sensor which generates a measurement signal indicative of grip pressure applied to the handle of a swingable object, such as a golf club or baseball bat. When the user's grip pressure falls outside specified threshold values, audible tones are generated. In both versions, the user receives the audible feedback signals via a headset worn while using the sports training aid.