Even trying a handful of them will take the pressure down a couple of notches, and you may be surprised at how differently you'll view the daily grind.
So, when you come out of work today, why not try something new?
Perhaps they're bullied, or fear redundancy, or worry that they've done something wrong, or simply just hate the place they spend their working hours but are afraid to leave it.
The resultant stress has an impact on many areas of your health from high blood pressure and reduced immune resistance to the possibility of depression and burnout.
Swimming lengths may be just what you need to switch off; or will it just allow you to ruminate on what's gone wrong earlier that day? For some people running is a cure-all, but for others it ratchets up their stress, especially if it's competitive.