Muscle Regeneration or Repair method comprises administering a range of retinoic acid receptor antagonist (rary); method for induction or Stimulation of Differentiation miog u00e9nica dComposition comprising and stem cells; mesenchymal stem cells; Pharmaceutical composition; kit.USO DE UN AGONISTA DEL RECEPTOR DE ÁCIDO RETIONOICO RAR? DONDE EL AGONISTA ES SELECTIVO DEL RECEPTOR DE ÁCIDO RETINOICO RAR? O SELECTIVO DEL RECEPTOR RAR?/ß PARA REGENERAR O REPARAR UN MÚSCULO EN UN SUJETO CON EL TEJIDO MUSCULAR LESIONADO.