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Keys Fitness recommends an equipment mat be placed under the unit to protect the floor or carpet and for easier cleaning. • Wear comfortable, good-quality walking or running shoes and appropriate clothing. Do not use this unit with bare feet, sandals, socks or stockings! • Always examine your unit before using to ensure all parts are in working order. • Do not leave children unsupervised near or on the unit. • Service to your Power System unit should only be performed by an authorized service re