Casio introduces a RFID Wristband based networked solution for fitness clubs.

With the Casio "mobile Check-Fit" system you can check-in to the club, track your training on the machines, pull up your training records on a PDA station or check your health parameters with a fully automatic hemadynamometer body constitution analyzers.
The PDA's (Casio Cassiopeia DT-5200) mounted on the fitness machines have a VOIP client so you can chat with your trainer, when you have a question.
Hey, this opens the door to India based call centers acting as personal trainers. Technology is just wonderful! It is not disclosed if Casio will sell the fitness club solution outside of Japan.
Via this Casio press-release (Japanese).