"You enjoy running, Chynah - not everyone does
The trick is to find something you enjoy and then stick at it! Not all exercise has to be running!
When I have to get up for a race on a Sunday sometimes I HATE it but it feels so good when it's done."
Totally agree. Do you think that athletes leap into action, full of happiness, for every training session? Not at all! Most of the time, its a hard slog, it hurts and its harder than staying at home watching tv. But it has to be done to get results. For me, that result is getting under 20 mins again for 5k, but alongside that, it means I have to stay slim and healthy.
Before I put anyone off running, I should just point out that as you get fitter, it becomes easier and you have to find harder things to get the same improvements. So a 30 min steady run is easy enough for me, a bit like walking for some people. But last night I had to do 10 x 300m on the track in 60-65s and I was having a bad night, didn't make my target times and hated every one of them but the last two. I really felt like I couldn't be bothered, and my asthma was playing up a bit too. But I still did the session and felt much better afterwards.
Thats pretty much the reality of it. You practise discipline, and you get better at discipline the more you practice it. Its a learned behaviour.