Youth Sports Concussion Act - Expresses the sense of Congress that the Consumer Product Safety Commission (CPSC) and the Federal Trade Commission (FTC) should review the National Academies' report on sports-related concussions in youth, and future research in this area, for any matter that may impact products under the CPSC's jurisdiction or inform the FTC's efforts to protect consumers. Makes it unlawful to sell or offer for sale in interstate commerce, or import into the United States for such purposes, athletic sporting equipment for which the seller or importer makes any deceptive claim with respect to the safety benefits of such item. Requires violations to be treated as unfair or deceptive acts or practices under the Federal Trade Commission Act. Sets forth the enforcement authority of the FTC. Authorizes the FTC to promulgate regulations to carry out this Act. Authorizes states to bring civil actions in federal court to obtain injunctive relief on behalf of state residents unless a civil or administrative action has already been instituted by the FTC. Allows the FTC to intervene and appeal in state actions.