Abstract: A garment, for the upper body of a wearer, includes: a covering of the upper body including sleeves for covering substantially all of the wearer's arms; a plurality of electrodes distributed throughout the garment at locations where each electrode makes electrical contact with one or more muscles of a wearer; an electrical power source for providing an electrical current to the plurality of electrodes; a control device for controlling the amount of electrical current provided to the wearers muscles. The garment includes a material that provides a spring force on the plurality of electrodes such that electrical conductivity between the electrodes and the skin of the wearer is maintained while the garment is worn.