I'm hugely disappointed that they discontinued the shuffle. It's the best music player for workouts period. No fussing with the bluetooth pairing, just plug in headphones, clip and go.
I personally use mine for swimming. You can buy waterproofed shuffles such as this one: http://a.co/f64p74y and they work extremely well for swimming. In fact when the shuffle was discontinued I immediately bought another one as backup to my trusty waterproof shuffle that I've used for 3 years.