A shoulder brace has: a support structure； strap retractors such as flat spiral torsion springs mounted to the support structure； and left and right shoulder straps each having a first strap part connected to the support structure and a second strap part connected to a free end of a respective spiral torsion spring. A method has the following stages: positioning a support structure against a user's upper back； looping left and right shoulder straps around a user's left and right shoulders, respectively； and in which each of the left and right shoulder straps connects to the support structure via a strap retractor, such as a spiral torsion spring for applying tension through the respective left or right shoulder strap to pull the user' s shoulders back.
