Peppermint Hippo ...... Recovery - a week between marathons is not a problem 2 weeks is much better but I think a lot of it is in the mind ..... I did 4 in a month all around 3:30 mark (1st one was 3:21) Look at Sir Rannulf Finnes.... 60 years old and 7 marathons in 7 days plus jet lag .... amazing. I did struggle with Amsterdam and then Dublin recently, but i didnt prepare if any at all. for the 4 in a month, I was averaging only 25 miles a week and a long cycle once a week. Its a tremendous buzz flying to an international marathon which helps too.