If you are considering buying an MP3 player for swimming make sure you get the best one by reading some reviews first. You don't want a dud which leaks or breaks. It is a good idea to buy a set bundled with waterproof earphones to save you money on buying a pair separately.
When you have an MP3 player which works under water you can learn to use it to your advantage. Create playlists which are tailored to your particular choice of activity, pace and goals for the day. Whether you are running, jogging, in the gym or swimming a waterproof MP3 player will put you at an advantage. It will keep you motivated when you are training on a dark cold winter's evening. It is worth using one when running in the rain as this can damage audio equipment, as can excessive sweating.
Keen swimmers would do well to buy ear plugs to keep their ears dry and infection free. These custom molded swimming ear plugs available from the renowned ZenPlugs are perfect. This is because they are non-porous and last for years. They are even antibacterial and kill all bacteria known to cause ear infections.