The invention resides in a posture training device comprising a signalling unit able to be worn longitudinally over a user's spine, the signalling unit having two ends that can be used to activate the signalling unit by tension being applied to either of the two ends; a waist strap able to be fitted around a waist of a user, the waist strap connected to one of the ends of the signalling unit; and a central strap able to extend adjacent the spine of a user, the central strap being connected to an opposing end of the signalling unit and to the waist strap.