Two runs, one swim

Last week I managed two gentle slow runs. They were a struggle, physically and mentally. I walked much of the way and was left feeling most unsatisfied. It's like my tyres were flat. So I've decided to park running till I'm fitter. So, how do I get fit? Today I went to the Swiss Cottage leisure centre. I used to swim there regularly 15 years ago but then I opted for the cold water of the heath ponds and lido instead. It was wonderful to swim in warm water again and I managed 30 lengths. I'm going back tomorrow. Stats: 30 lengths; 30 minutes.