St Kilda coach Ross Lyon has floated the radical idea of reducing AFL games to two, soccer-style, 45-minute halves to lessen the physical impact on players and shorten a day at the footy.

Amid league-wide discussion on how to reduce the physical toll on players in games of four 30-minute quarters, Lyon said reducing the duration of games by 25 per cent would please players, coaches and fans.

"They talk about changes to the game and (reducing the number of) interchanges, maybe it's about two 45-minute halves," Lyon said after the Saints beat Fremantle 16.12 (108) to 14.9 (93) at Etihad Stadium on Sunday night.

"Being a player and a coach you think 'Geez, it goes for a long time'.

"Maybe it is about two 45-minute halves.

"We're throwing up a lot of different options, but it's the one for a long period of time I've thought about.

"It would be explosive and electric and it wouldn't just become that war of attrition.

"Two hours is a long (time), 120 minutes it's an enormous amount of time and the demands on the body, so maybe it is a shortened version."

Lyon conceded Australian rules was a game of attrition, but felt his proposal was "worth looking at".

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