It was an early start for North Melbourne's players on Thursday for a skills session at Aegis Park.

The Kangaroos were on the track before 10am and had very little time to rest until returning to the change-rooms three hours later.

It was all about skills at the start of the day, but by the end the exhaustion on the players faces was clear as a circuit including sprints, push-ups and power exercises made sure there was nothing left in the tank.

Photographer Michael Willson from AFL Media was on hand to capture the best photos from the session:

Brent Harvey and Matt Campbell

Brad Scott watches on

Jack Ziebell

Stretching up

Andrew Swallow under pressure

Drew Petrie

Majak Daw

Kieran Harper

Brent Harvey

Jack Ziebell

Andrew Swallow and Lachlan Hansen

Brady Rawlings and Brent Harvey

Matt Campbell

Daniel Wells

Lachlan Hansen

Robbie Tarrant