Recovering: Dayne Beams.

Recovering: Dayne Beams. Photo: Sebastian Costanzo

Collingwood has been hit by a nasty case of ''Bali belly'' with a group of senior players yet to fully recover from a recent trip.

Midfielder Dayne Beams has shed weight and remained at home on Monday while Travis Cloke, who has regained the three kilograms he lost, was restricted to gym work as the Magpies began the new football year with a punishing two-hour session involving sprints, distance running and football drills.

Steele Sidebottom and Brent Macaffer ran laps as they had also been ill and while Ben Kennedy did train he is still on the mend.

The Magpies' head of football, Rodney Eade, said the players had not travelled to Bali together.

''We have had a few blokes who went away to Bali at Christmas time and a few have come back with a bit of Bali belly,'' he said.

''We have about five or six in the same boat. There is a bit of it going round, unfortunately.''

Eade said he was unsure what had sparked the sickness.

''I don't know whether it was food or the water,'' he said.

Eade said he expected Beams, who has been sick for a week, to rejoin training on Wednesday.

While Beams recovers, fellow midfielder Clinton Young impressed with both his ball work and endurance during a searching session that, at one stage, had tennis coach and commentator Roger Rasheed as an interested onlooker.

Plagued by hamstring and calf problems, Young managed just two senior matches in his first year with the Magpies but is expected to be a major contributor and provide greater run and carry this year provided he is fit.

''He had a slow build-up before Christmas and ticked every box with a view to going flat out after Christmas. He has progressed pretty well after Christmas,'' Eade said.

Ruckman Jarrod Witts and small defender Ben Sinclair have yet to join in contested work as they recover from shoulder reconstructions, while Marty Clarke is ahead of schedule in his comeback from an ankle reconstruction.

Veteran midfielder Luke Ball is on his honeymoon and did not take part in the opening session.

Eade said contract renegotiations with Dane Swan, handled by Magpies list management boss Derek Hine, had been ''pretty fruitful'' and an official announcement was close. The champion midfielder is set to sign a two-year extension, through to the end of 2016.

The Magpies begin the new campaign with the opening NAB Challenge match against Geelong at Simonds Stadium on February 12.