Wearable fitness device and fitness device interchangeable with plural wearable articles

A fitness accessory kit comprising:

• a first wearable article;
• and
• a fitness device for measuring cumulative distance traversed or number of steps by a person selected from the group consisting of mechanical pedometers, electro-mechanical pedometers, electronic pedometers, and accelerometers, the fitness device
• comprising a display having plurality of lights that are configured for illumination as fitness intervals are achieved by a user,
• constructed and arranged to be removably attached to the first wearable article;
• includes swivel connectors at two opposing lateral sides of the fitness device;
• wherein each of the swivel connectors include a distal cross member having an internal stem extending therefrom with a shoulder, wherein a portion of a housing of the pedometer is rotatably seated on the internal stem, and an external stem extending from the shoulder with an aperture therethrough for receiving a ring, and wherein the wearable article includes end connectors that removably attach to the ring attached to each of the swivel connectors.