Back to back

After a tough swim last night it might seem mad to have gone for a swim this morning. Feeling tired now, I think it might have been! Today I worked short sets with the paddles after a slightly slow warm-up. It was under, but rather close to, 5:00 minutes.Back to back runs are quoted as being a good way to simulate a long training session so hopefully I can take my general and localised fatigue as indicators of lots of training.