ADAM Coote isn't your normal AFL boundary umpire.Typically, the whistle blowers on the ground's fringe are of a lean build different to Coote's muscly appearance.But being outside the mould hasn't stopped the former Camperdown man progressing through the AFL ranks.Today he will officiate in his third AFL grand final as St Kilda and Geelong battle for the 2009 premiership.Umpiring director Jeff Gieschen said Coote's build made him one of the most powerful boundary umpires in the league.``He isn't the typical build of a boundary umpire. Most are lean because it is such an endurance sport they run 19-20 kilometres a game,'' Gieschen said.``But Adam is extremely powerful and very professional in his approach to umpiring, particularly in his preparation.``His core and upper body is strong which he builds up doing weight training,'' he said.Coote began umpiring with the Colac and District Football Umpires Association when he was 14. Camperdown College teacher and field umpire of more than 500 games, David Robertson, introduced him to officiating.Coote wasted no time refining his throw-in technique, practising with a brick at his family home on the outskirts of Camperdown.``I actually used half a brick because a full one hurt my shoulders too much,'' he said.Coote said the 2009 home-and-away season had been his best since stepping up to the AFL ranks.He said he was yet to make any decisional errors.``I've been pretty consistent this year. I think I'm entitled to be a little bit nervous before the grand final. There will be a few butterflies in the stomach,'' he said.``But once the game begins we get on with what we do every week.'' Gieschen said all AFL central and boundary umpires aspired to officiate in a grand final.``It's similar to players wanting to win a premiership,'' Gieschen said.``Umpires have a sense of pride and achievement being appointed to a grand final.``The stress of the game is no different to any other. They (umpires) are so well prepared, they have done their 25 or 26 games for the year and are good at their craft,'' he said.``Really, apart from the hype around the event, they just go out there and do what they do week in, week out.''Coote will join Darren Wilson, Mark Foster and Mark Thompson as the boundary umpires.Warrnambool export Shaun Ryan will officiate in the centre with Stephen McBurney and Brett Rosebury. The goal umpires will be David Dixon and Mark Canning.