If you've been out in the cold weather to exercise today, then you'll be feeling very virtuous, but before you pat yourself on the back, think about those taking part in the UK Cold Water Swimming Championships.
Tooting Bec Lido was the venue, where those brave enough competed in temperatures as low as minus one. Phil Bayles reports.
Tooting Bec Lido in South London Swimming Club hosts the 5th UK Cold Water Swimming Championships today.
With water temperatures as low as 1°C, jumping in for the 30 yard races is a challenge in itself.