are invaluable if you find it hard to keep track of how many lengths you've swum. You can use any sports watch (if it's water-resistant), but swimming-specific devices are easier to use. The SportCount Chrono 100-lap counter and timer (£24.99, www
half). A watch with a lap-timing function will allow you to keep track.MP3 playersIf you find pool swimming boring and the joys of the open-water season are still too far off, you could consider using a waterproof MP3 player to make your pool time a
