Freezing the action is the ultimate aim for a lot of sport photographers. It is the capturing of furious movement, into one stopped-still moment, that gives sports photography its power.

There are two basic ways of doing that. The first, and most common, is through fast shutter speeds which require a fast lens, a high ISO setting and good clean light. Or alternatively, by exposing your shot with a light source that has a very short duration, like a portable flash, that allows you to freeze the motion and get the gold, whilst keeping normal shutter speeds.