:minutes:seconds): : : Please estimate my time for: kilometresmilesPredicted time (hours:minutes:seconds): : : The formula was originally devised by Pete Riegel, a research engineer and marathoner, and published in Runner's World, most recently by Owen Anderson in 1997

at Runner's World for 10 years and took over the marathon schedules when Bruce Tulloh retired from writing them. Steve has run more than 60 marathons (26 Londons) and as well as holding a PB of 2:29, he has also won a British marathon title in his age group

and stuck with them. I never felt that I dropped back in the pack which was brilliant.All my race-day strategies worked too. I took a carb gel about Mile 6, then another one at Mile 13. They really helped me overcome any wobbles, although I did feel a bit

before, Sue took too much from her body and struggled to recover in time to race optimally. But that’s what build-up races are for - make your mistakes, learn and move forward as a runner so you perform when it’s important. Beware the greedy runner. When