I completed the last of my 4 marathons about 2 years ago but after a cancer diagnosis, the loss of my mother and a battle with depression I gave up running and piled on a fair bit of weight. I went for my first run last week and was amazed at just how unfit I was (1.7 miles and I’d stopped). So as extra motivation to get my fitness back to where it once was I’ve decided to run to London next April (Sunday-Friday) and then run the London Marathon on the Sunday. Seeing as my fitness has gone back to beginner levels, is a year of training enough for this? I feel like my previous marathon experience will help my training but my wife is worried I’m taking too much on.