Casio has developed RFID'd rubber wristbands for fitness clubs. The training facilities would have to fit each piece of their training equipment with a a PDA that reads the wristband tags. The PDA would recognize who's using the equipment and display a personalized training session. It also records and displays personal health-related data.

The RFID-tagged wristbands can also do the usual stuff: manage check-in/out, track members' activities, monitor kids' attendance to a fitness program, call fitness club staff in an emergency situation, and serve for cashless payment.

Casio hopes to sell the system to gyms, hot springs, swimming schools, and public bathhouses as well.
Whatever! As long as that bracelet doesn't start to beep loudly when I'm cheating on the treadmill, I'm all for it.

Via RFID in Japan.