So.... when are the endorphins that I hear about suppose to kick?

I started the couch to 5 km challenge and lasted all of.... 3 sessions. I missed one day... that became 2 days, that became 3 and never did it again. So I thought that maybe if I did it everyday that I could maintain it a bit better, I wouldn't keep putting it off. It's only for 1/2 hr every day.

So I started on Sunday and did it again on Monday and really hated it yesturday... really struggled to get through it. So of course I found an excuse not to do it today.

I have 20+ kgs to loose and I find at the moment I don't have any motivation to do anything, I would happily sit on the lounge all day every day so I figured part of the problem was being overwieght and not having any energy. This running thing is free and doesn't take up much time.... so why can't I do it? How long do I have to keep at it before it starts to get easier to do more exercise?


Any advise welcome, TIA