KEY defender Jackson Trengove is out of the moon-boot and back running, albeit on the club's anti-gravity treadmill.

Trengove underwent ankle surgery following an injury in the Showdown on June 29 and has been on a restricted training program since then.

On Monday, Trengove tweeted a photo of him finally removing the moon-boot which he'd been wearing for three weeks.

Today, @jacksontrengove tweeted a photo of him running on the Alter G - the club's anti-gravity treadmill which allows players in rehab to run on a percentage of their body weight.

High performance manager Darren Burgess said Trengove was unlikely to join Alipate Carlile and Angus Monfries in the side to face Collingwood on Sunday 3 August.

"Jackson's probably a long shot for Collingwood, but he does recover quickly, so we'll wait and see how he's looking next week," Burgess said.

Trengove is listed as 2-3 weeks away from playing, giving hope for a return in the Power's blockbuster against Sydney at Adelaide Oval on Saturday August 9.