Listening to music or podcasts during training used to be a luxury only land-based athletes such as runners and cyclists could enjoy.
But not any more! There have been incredible developments in waterproof MP3 player technology over the past few years, meaning swimmers can also benefit from hearing their favourite songs while under water.
You can now buy a waterproof MP3 player for swimming along with waterproof headphones, helping those long solo training sessions go by a little bit quicker.
A swimming MP3 player has all the functions of a standard device, except it clips comfortably on to your goggle strap.
Swimming with a waterproof MP3 player can not only relieve boredom during long swims, but it can also improve your rhythm, stamina and mood.
Picture the scene. You're approaching the end of a long session, and the temptation is to finish up a few lengths early. We've all been there, right? Well, if you're using an underwater MP3 player, you can find your favourite tunes and power on through!
If you fancy a change from music, a waterproof MP3 player can also be used for podcasts or audiobooks. Swimming MP3 players such as the FINIS Duo support all unprotected MP3 and WMA audio files.