Not true. The workout Ipod (excuse me MP3 player in this case) stays in the gym bag, which stays at work, since I work out in the middle of the day. The other one hooks to the car, or my remodel job-site radio. When I tried to use just one, and switch between playlists, vehicles ,and locations, I invariably forgot it either in my gym bag, my play truck, or the remodel project and never used it.

Now is much better. Salmo G. you should get one, especially for the gym and bike rides. You will get the concept as soon as you put your 60/70s rock mix in it.
Believe me, there will be no going back.