Sounds like you're overcomplicating things Speedy. You obviously want to run otherwise you wouldn't be on here would you.
Keep it simple. Forget about your weight, forget about your past performances, forget about your age and forget about everything else. Go out, put one foot in front of the other at what ever pace you feel comfortable with (even walking) and keep going until you're tired.
Thanks for all your responses. I've really enjoyed reading them. I'd just like to set the record straight: a) I'm not injured but am relatively new to running so am worried about nit maintaining fitness levels; b) my new wife is very supportive if my running and has not refused to let me run!!; c) the hotel were staying in is up in the hills and the surrounding roads are pretty dodgy he ce running not being and option. You've all be a great help and have generated a very interesting discussion. Cheers. I'll let you know how it goes.
I've recently wed and we are soon to be going to Sorrento on honeymoon. I've been making good progress with my running and don't want to take 2 weeks off all activities (no jokes please!!!) Running isn't an option whilst away and apart from swimming in the relatively small pool, I'm a little stuck as to what to do to avoid slipping back in fitness and having to claw back my progress when I get back. Any ideas from seasoned pros and people of experience?