Fremantle are set to unleash skipper Alex Pearce against Port Adelaide at Adelaide Oval on Saturday night.
Pearce has played just once over the past 10 weeks due to a hot spot in his shin.
The 30-year-old was struck down by the injury following the round 11 win over Port, returned against Sydney in round 17, before being grounded by a recurrence.
After spending the past month on the sidelines, Pearce is ready to come back again, but there are no guarantees about how he'll pull up.
"With this injury, he's not going to be 100 per cent," Longmuir said before training on Wednesday.
"We're not sure how it's going to pull up in some sense after running 13.5km and being as combative as he is in a game of AFL."
Pearce will be locked in to play against the Power as long as he pulls up well from main training.
Fifth-placed Fremantle (14-6) have won 10 of their past 11 matches.
After facing the Power in Adelaide, Freo host the Brisbane Lions at Optus Stadium and then round out their home-and-away campaign away to the Western Bulldogs.
Justin Chadwick - AAP
