The double road race is an interesting concept introduced by Bob Anderson-the founder of the Runners’ world Magazine where the distance is split into 2 races. For instance, if it’s an 8 k double then participants would have to run a 5k race, take a break for 45 minutes and then run the 3k race. The total time of the 8k will be a sum of the 5k and 3k timings.   Sounds easy, right? Not quite as Bob said…