US Patent 10143878 Resistance shirt for muscle toning

A movement resistance shirt for providing muscle toning to a user wearing the shirt. The shirt including a pair of semi-rigid shoulder anchors each configured to circle a shoulder of the user and a pair of long elastic bands each extending between first and second ends. A second end of at least one of said pair of long elastic band dangles out of a cuff of said shirt, and each one of the long elastic band is attached at its other first end to a respective one of the shoulder anchors.