How many times have you run 5k? Do you reckon you know this distance well enough to guess when you’ve run it? Well that’s what Jess, Sarah, Mo and Tom are trying to do in this challenge.
There are more and more world record being broken in the marathon, but why? Is it the technology, the training, are we just getting naturally faster? Let's look into it!
Tom has been training harder than ever to get his shiny new PB, but will his Garmin watch help him get it? We’re about to find out as he takes on the Vitality 10k...