race in Brussels in August 2007, which means they have to run well at the Flora London Marathon at the end of the month.And then there are other runners like Eric, who rolls out of bed on Monday and decides he's going to race a 5K on Sunday after

before a 10K, half-marathon, or marathon. The pace in these longer races will seem slow and easy by comparison.Goal: 5K for fun and fitnessHow often: Sixteen to 20 times per year.Why: If you hate speedwork, run a 5K every other week or so. It will help

Long run Do a five-mile warm-up, the 6.2-mile race at marathon pace and finish with four slow miles, for 15 in totalWeek 2Run your usual mileage with a moderate interval workout midweek (1 mile-1200m-800m-400m step-down) and do a two-day taper

’s somewhat inconvenient, here is an easy way to make a reasonably close guess: add 35-40 seconds per mile to your 5K race pace, or 15-25 seconds per mile to your 10K race pace.Then you need to train to raise your threshold. Try the following two training