New Wales fitness coach Andrew Hore has revealed Wales players will have to work on their anaerobic fitness and leg strength.
The 30-year-old, who worked with Wales coach Steve Hansen at Canterbury, has been putting players through their paces with a series of physical tests since arriving on Monday.
One of his main roles will be to form close ties with club coaches to establish a structure to improve players' fitness levels.
The Kiwi believes Wales are generally in good shape ahead of next year's World Cup in Australia.
"Wales had a rough time during the Six Nations but have improved during the last few months and recently ran South Africa close.
"If we can start building now and get the structure right this side can grow.
"At the moment only about half of the squad have been tested and we do need to look at anaerobic fitness and leg strength.
"It is too early to judge overall fitness levels but, from what I have seen, there is a huge amount of potential in the side.
"I am testing the lads and the way they train and co-ordinating a plan to improve overall fitness levels.
"I will be looking to forge close relationships with the club trainers and that is the key.
"If we can start working together for the good of the players then we can start getting some good results."
Despite drawing with Ireland in the opening round of the RBS 6 Nations, Wales defence coach Shaun Edwards believes the championship 'is still in our hands' as he prepares his side to face Scotland at Principality Stadium tomorrow.
Meet the members of the WRU's inaugural Youth Board - after an online selection process which saw a host of high calibre candidates submit video applications the WRU has made its first 15 appointments.The board is made up of individuals aged between 16 and 21, and will meet for the first time at Principality Stadium on Monday 15th February.
The Wales Women's team headed to Dare Valley Country Park on a team bonding exercise as the entire squad got together for the very first time in preparation for this season's Six Nations championship which kicks off on Saturday with a clash against defending champions Ireland, in Donnybrook.
Wales Head Coach Warren Gatland discusses his team selection for the opening round of the RBS 6 Nations where he leads his side against Ireland, on Sunday. As WRU TV's Luke Brodley discovers, Gatland is fully aware of the challenges the defending champions pose