1st Taste of running for 15 years

OH my God!!! What a nightmare, I decided to start straight away, I went out for a jog. Running for what seemed miles turned out to be 1/2 mile. 19 mins, That means at that rate it will take me 17 hours to complete the Marathon. Oh My God. I'm Knackered, I can feel my heart pounding.  This is going to be hard work. But you know what i enjoyed it.  I am going to prove every one wrong. they all doubt me, so "Fat Boy Run", lol.   I need a kip.