The Ireland squad hit the gym at Surrey Sports Park on Tuesday (some photos from the session here) under the guidance of strength and conditioning coach Jason Cowman.
In a video for the IRFU's YouTube channel, Cowman explained the different types of weight exercises which the players would be carrying out during the session.
Centre Darren Cave described it as 'the toughest day of the week'.
It can sometimes be the toughest day of the week because you're still trying to shake off those niggles, bumps and bangs from the weekend and you feel a bit dusty after having the Romanians trying to knock the head off you for 80 plus minutes but it's just all part of the job.