It's taken over the small transistor radio, portable cassette players and other devices that we used down through the years. You see people running with these in their hands or pockets. I suppose it helps them utilize the time spent exercising, while listening to music on their
ipods selections. The only drawback I can see in this situation, the the ability to hear some of the things that may be happening around you. Some areas of our town, is unsafe to exercise and you need to be able to hear approaching traffic.