The Spanish club's physical trainer Antonio Pintus favours using the K5 masks to measure players' physical condition ...

Real Madrid returned to training this Wednesday after two days off, and they did so with a key figure taking control at ...

Real Madrid players are performing a typical stress test, but with a portable system to measure their maximum oxygen uptake. The good thing about these masks is that they are portable and allow you to ...

Real Madrid players have been pictured taking part in high-intensity drills while wearing unusual blue masks - so what's the reason for them?