Leeds United are travelling to Austria and Norway for a pre-season training camp.
He said: “There are two options – you can go for a conditioning camp very early on or you can go for a playing camp just before the season starts. I wanted to go away and meet two very strong opponents to expose ourselves against teams where we have to run a lot and we have to chase a lot.
“We’ll be able to see where our fitness is at – German teams are normally very fit.”
Leeds have already played a selection of lower league teams this pre-season, but Rosler wants to ensure his squad are facing top opposition before the start of the Championship season.
They will take on Eintracht Frankfurt and Hoffenheim over the next week, and Rosler is keen to assess his players’ fitness levels against top class teams.
He wants to play against teams where Leeds will be on the back foot, and will be forced to learn their off-the-ball style to a much better level than they have been.
Rosler is keen to incorporate a high pressing style into Leeds’ play for the coming season, and playing against the two German opposition will give him the perfect opportunity to ensure they have learnt the system to the best of their abilities.
The two opposition will prove a challenge for Leeds, and it would not be a surprise to see the Whites lose both games. However, it will be a case of taking a step back to move two steps forward, and the lessons learnt on the training camp could prove invaluable to Leeds ahead of the 2015/16 Championship season.