A stretching device that enables a user to employ the mechanical advantage of a multi-pulley system while performing various, prolonged muscle stretches; the stretching device including a first anchor assembly, a second anchor assembly, and a motion transfer line. The first motion transfer line has a first anchor body and a first motion transfer pulley; the first anchor body being attached to the user and the first motion transfer pulley being coupled to the first anchor body. Similarly, the second motion transfer line has a second anchor body and a second motion transfer pulley; the second anchor body being attached to a stationary object and the second motion transfer pulley being coupled to the second anchor body. The motion transfer line is terminally attached to the first anchor body and is trained around both the first motion transfer pulley and the second motion transfer pulley.