I often listen to books on tape on my Rio MP3 player while exercising.
When the going gets tough, I switch to my favourite high energy music for a jolt.
The next step?
Lance Armstrong has already endorsed a unique wireless connection between your Nike shoes and an iPod. It has a number of cool features including a Power Song button which jumps to the motivation track the instant you need it.
Newsvine – Nike, Apple Team Up on iPod Running Gear