The fitness card can be returned. The expenses in the fitness card are not consumed by consumers, but the advance payment is deposited in the gym account, and the parties can ask for a refund. If the gym does not refund, consumers can negotiate with the operator and reach a settlement agreement. You can also find a consumer association to mediate and safeguard your legitimate rights and interests. If the gym is unwilling to negotiate and mediate, if there is an arbitration agreement, it can be submitted to an arbitration institution for arbitration, or it can directly bring a lawsuit to a court with jurisdiction.