i`ve been running for 3 years now. for the first 2years i just ran for pleasure and off 20-30 mile/weeks with that i done a 3hr35min marathon an 87 min half mara. problem is on new years day i stepped it up to 50 miles/week an in january after 2 1/2 weeks of this an an easy week i turned up at a half expecting 90mins but got 84 mins but on april 10th i`m doing the Llanneli marathon but dont have a clue what to go for. PLEASE CAN SOME/ANYONE HELP ME OUT HERE. suggestions massively appreciated.thanks in advance.