Abstract: A universal resistance cross-training system is described which is adapted to direct a variety of resistance forces to robust portions of an exerciser's limb, while leaving hands and feet free for normal use. The system is based upon an arched cuff which provides both transverse compression sockets at either end and ratcheted channels following the outside surface of the cuff and extending between the two compression mounts. Resistance devices such as fins, elastics, weights, parachutes, floats and linkages are connected to the cuff via either the compression sockets or the ratcheted channel. The resistance forces are transferred from the resistance devices through the arch to the user's limbs.