The patent (US 2008/0077620 A1) shows also some screen shots of the software and the hardware is presented in other patents filed by Apple in 2007.
So, how long before we will be seeing tools for sports scientists and fitness instructors on the market able to be interfaced with Apple devices? Not very long. Apple in fact released the SDKs (software development kits) few months ago and I am sure a lot of people are working hard to deliver some apple-based solutions for sports scientists. The lifestyle companion system (this is the name of the patent) will allow also the possibility of setting specific goals, tracking progress and sharing information with an internet-based community.
I am looking forward to see it in action!