A muscle stretching device. A first base and a second base each include a foot adjustment portion and a connector portion. The connector portion of the first base is coupled to the connector portion of the second base. The connector portions are adjustable to adjust a distance between the foot adjustment portions. A right foot support is pivotally coupled to the foot adjustment portion of the first base and is rotatable relative to the first base about a first vertical axis. A left foot support is pivotally coupled to the foot adjustment portion of the second base and is rotatable relative to the second base about a second vertical axis.