You will sweat a lot - you don't notice when you're swimming, because you're already wet. You should replace some fluids, but for 5km, you shouldn't need too much.
When I did double-ironman (7.6km pool swim), I had water, energy drink and Clif Shot Blocks, but then was also fuelling for the rest of the event.
You will sweat a lot - you don't notice when you're swimming, because you're already wet. You should replace some fluids, but for 5km, you shouldn't need too much.
When I did double-ironman (7.6km pool swim), I had water, energy drink and Clif Shot Blocks, but then was also fuelling for the rest of the event.