Systems and methods provide a position sensing component that carries a gravity sensor sized and configured to provide a position dependent output indicative of the relative sleep position of the individual. The position sensing component can take the form of a strap sized and configured to be worn about the neck, or be integrated into a therapeutic oral appliance sized and configured to be worn within an oral cavity of the individual. The position sensing component is worn by the individual during sleep. The systems and methods compare the position dependent output with one or more benchmark conditions that correlate to a desired sleep position, and generate an alarm output when the individual is not in a desired sleep position, to thereby influence or alter the individual's sleep position to return the individual to a sleep position that correlates to a desired sleep position.