London Marathon Training

So for next year im going to be running the london marathon , this is just over 26 miles of London road, just thought this is part of getting more cardio exersise in my life i may as well have an aim to go for. im not going to be road joggin in preperation for this, i find jogging around the streets very depresing, for some reason as soon as you leave your house, freaks and weirdos seem to think you are public property for harasment. shouts from cars ect. which is bloody sad, so im working on this training within the confines of my own house and room which suits me fine as i have water , music and space to do more than just jog. Ive got the stairs to up and down, which is hard work. i can drop down after 20 mins of jogging and push out 40 pressups then roll over and hit some crunches for working the core. An average time for doing the London marathon as around 4 hours , so doing a couple of fun 2 hour sessions dancing jogging and messing around in the house per day seems like an easy w...