From September to December last year I swam regularly, but then I was hit by a monster cold that refused to go away for 3 weeks. I stopped swimming and decided to run instead, and in January I started the Couch to 5k programme. At the time I stopped swimming I could do 8 laps of the pool (50m per lap). I swam ONCE in February (could do only 5 laps that day) and fell ill again 3 days later so stopped again.
Today was rest day so I decided to go for a swim instead of literally rest. The first lap was difficult, but then it felt amazing! I usually swim two lap sets, then take a break to catch my breath, and I was taking less than 30 second breaks before doing the next set. Whereas back when I swam regularly I would have to stop for a couple of minutes at least to catch my breath. And, despite not having gone swimming in months, I did 10 laps today! I could have gone on but decided not to overdo it.
This is, without a doubt, because of running. My fitness levels have improved drastically in the last 3 months. I can't wait to see what happens the more I run