I`m wondering too if you are swimming in a pool or the sea? Either one can be hard on the hair itself, the salt in sea -water, and the chemicals [Chlorine] in public swimming pools. I reckon it would be beneficial to wash /rinse the hair in fresh water after such activities.... there was a post on this some time back as far as I can recall....... can anyone who swims regularly help out with some info here please ??