Abstract: One of its aspects this invention provides a simple stomach muscle condition monitoring apparatus. The apparatus includes a spine which encompasses a first longitudinally elongated base member, having a first, free end and a tongue longitudinally extending from the second, remaining end, and a second longitudinally elongated base member having a first free end and a longitudinally extending slot in the second, remaining end. The slot receives the first base member tongue. Means are provided to secure the tongue in the slot at various longitudinal positions thereby permitting the longitudinal length of the spine to be adjustably varied. Sensing means, preferably pressure sensor means, connects to the spine and is preferably positioned transversely to the longitudinal axis of the spine's two base members. An alarm connected to the sensing means produces a signal upon actuation of the senors; the sensor may also (or alternatively) actuate a remote recorded message or instructions for the user.