upping the pace

Back to Crystal Palace for some lengths. Matched a swimmer in the fast lane for the 1st km to work the lungs out - achieved. Took it slightly easier on the second km, and then did another 400m slowly, on my back and a 50m sprint. Feel like I've had a work out. Chlorine and warmth a bit much though. Back to the chilly embrace of Tooting Bec Lido tomorrow.