Abstract: An elongated base frame forms generally horizontal parallel tracks which support a pair of foot support platforms and carriages for independent longitudinal movement. A vertical column has a releasable pivot connection to one end of the base frame and supports a pair of arms for 360.degree. rotational movement as a unit on a horizontal axis. Each arm is also supported for pivotal movement through an angle of about 90.degree. on an axis normal to the horizontal axis, and retractable stops provide for selecting different rotational and angular positions of the arms. A spring retractable cable reel is mounted on each arm, and a flexible cable extends from each reel around a swivel pulley on the outer end of the arm to a handle grip having a V-shaped configuration. Each of the foot support carriages has an adjustable sliding brake, and each cable reel is connected to an adjustable disk brake through a one-way clutch.