Posted: 09/08/2016 at 12:31
tricky problem. I think for now you need to put your previous running PBs into a shoebox and forget about them. Have a google for C25K to help you structure your re-introduction to running.
Focus on something other than time, be it potential weight loss, just the feeling of being able to run pain free (I hope you have the sciatica under control) or just the enjoyment of being out in the great outdoors. Try stuff you haven't before- if you were a dedicated track/road runner then what about some cross country, fell running or orienteering. Try to incorporate exercise into your regular routine so the hump of 'getting out the door' is reduced. I've got my running kit with me today and I'll run to the 'next station down from my regular one' so I get a running fix at the same time as the commute home.
If you've got a parkrun local to you, you might find the social side of it rewarding, but if you prefer your own company that's also fine.
As you say, you need to start somewhere, so how about today?