Carlton has installed a $25,000 GPS treadmill at Princes Park.

"We use a GPS Judd wears in a harness under his guernsey to collect information including stoppages and accelerations," spokesman Ian Coutts said.

"The data is loaded into the treadmill's computer and a young player can use it as his program to become an elite midfielder."

The Blues have also bought a reflex machine, spotted at soccer giant Manchester United by coach Brett Ratten on an end of year educational trip.

It offers a series of tests the club believes will improve player reaction time.

Mr Coutts said footy had come a long way from screw-in boots, and woollen jumpers.