Runner monitoring device

A device for continuously monitoring the orientation of an individual's physical posture relative to a path the individual is traversing includes a transparent tube attachable to the bill of the individual's cap, and extending beneath and to opposed sides of the bill, a pair of fastening elements with each fastening element securable to an end of the tube so that the tube can be secured to the bill by the fastening elements, and a spherical member disposed and visible within the bore of the tube and susceptible to shifting therein as a result of the individual's movement while traversing the path.