Sort:  

The only problem is the coooold water and not really nice for swimming. :) Jadran is the best! :D

It's a shame that it's cold water. There's a man who can stand in ice water. You may have heard of him.

Wim Hof, I believe. :)
I know people doing some of his breathing exercises regularly - and they are awesome. In terms of energy and vividness. :)

Have you tried any of his exercises.

I'm not yet, but I'll do them soon: D