SYDNEY Swans coach John Longmire has instructed Adam Goodes to stop sliding into contests, even if it places the superstar at risk of injury.

The Swans have experienced both sides of the controversial sliding saga this season.

Goodes has been suspended twice this season (including once during the NAB Cup) after launching himself legs-first towards the ball, while youngster Gary Rohan suffered a season-ending broken leg at the SCG on Sunday after North Melbourne's Lindsay Thomas went low as he attacked the ball.

Longmire said he had counselled Goodes about changing his technique to avoid further suspensions.

"We had a chat about it (and) the only other option for him is to stand up," he told SEN radio on Monday morning.

"So regardless of what the opposition do, whether they go to the ground or stand up, all he can control is to stand up.

"Whatever happens after that, I guess happens. Whether that puts him at risk I'm not too sure.

"But he just needs to make sure he stands up in the contest."

Longmire is also concerned about "grey areas" in the adjudication of 50-50 contests, expressing some confusion about what constitutes a legal attack on the ball.

"I'm looking at the whole of those 50-50 situations," he told SEN. "I think there's still some grey areas in that.

"But it's also a difficult one to get right because there are so many things that can happen in that situation."

Goodes will break Michael O'Loughlin's club record of 303 games when the Swans play Hawthorn at Aurora Stadium on Sunday.