GROIN pain has forced Melbourne's Jack Watts to undertake a revised program in December, but he is expected to return to full training immediately after the Christmas break.

The club decided to wind back his training loads after the 23-year-old noted some groin pain while training in late November.

Melbourne football manager Josh Mahoney told that Watts would benefit from the cautious approach.

"He has been off legs for a couple of weeks and just gradually building up his running," Mahoney said.

"The aim is for him to get back into full training post-Christmas break."

Watts trained on an exercise bike next to Gosch's Paddock on Monday as the team ran two one-kilometre time trials before an upbeat skills session.

He has played 95 games and is coming off his most consistent season since making his debut in 2009.

The Demons have more players on the track heading into 2015 than they did at the same time last season.

Max Gawn has made a good comeback from his knee operation and is resuming full training this week.

The improving ruckman injured his meniscus in the final round of 2014 and underwent post-season surgery.

Midfielder Bernie Vince is expected to join in contact work in January after having shoulder surgery post-season.

Mahoney said Vince was back on the track and gradually participating in more drills.

The club is also taking a cautious pre-Christmas approach with Aidan Riley and Dean Terlich, who have both experienced shin problems, and Jake Spencer who is recovering from a back injury.

Midfielder Jack Trengove is now out of a cast after undergoing surgery to repair a navicular injury in October.

"He has moved into the [moon] boot and he will start doing some light load training," Mahoney said.