9 September 2011 Last updated at 06:32

Insider's view - the tactics of triathlon

Join British Triathlon coach Mark Pearce inside Hyde Park as he talks BBC Sport through Alistair Brownlee's emphatic victory.

Pearce points out some of the basic strategies Brownlee uses to win the race, and explains how coaches communicate with their triathletes during the event.

Brownlee and younger brother Jonny are now ranked first and second in the sport's World Championship Series standings, heading into this week's grand final in Beijing, China.

The elite men's triathlon grand final, from Beijing, will be shown live on the red button and the BBC Sport website on Saturday, starting 0530 BST .