The issue focused on by two leading scientists is one of speed. If you want to run faster, you need to find the best link between speed and strength. But there's an issue that could mean that we should start looking at what actually works to increase speed.This was the subject of a debate at the London Sport Festival. Dr Richard Bull from the University of Cambridge and Dr Kim van der Meer from the University of Liverpool asked their audience to rate the science and potential benefits of running at different speeds. They