Model and celeb runner Nell McAndrew joins ultra marathon runner Jackson Williams to deliver top tips for the Royal Parks Foundation Half Marathon. It includes advice that will help you both before and during the big day. Both Nell and Jackson are using the Nokia Sports Tracker as part of their training programme.

Training for a 10-mile or half-marathon race involves keeping a steady pace for the first half of the race, and gradually increasing speed through the second half of the race. Train to run between 10 and 13 miles using the negative split technique with tips from a running coach and certified sports trainer in this free video on running. Samuel Harvell is certified through the National Endurance Sports Trainers Association (NESTA) and is an experienced running coach. Filmmaker: Bing Hu