Stuttgart  - German Formula One driver Nico Rosberg has called for a minimum weight for Grand Prix drivers.

In an report by Der Spiegel news magazine made available ahead of Monday's publication, the Williams driver said that if a pilot did not weigh enough, weights should be placed in the car.

Several drivers are said to have lost a considerable amount of weight since last season to compensate for the heavier weight of their cars which has been brought about by new regulations.

The 23-year-old Rosberg admitted that he too "looked very carefully at his body over winter."

He said that there was a huge amount of pressure on the drivers and that some teams even called on their drivers to lose weight. "It should not be that we start looking like ski-jumpers or jockeys."

Rosberg said that smaller drivers like Felipe Massa had an advantage over their bigger rivals and that there should be a minimum weight for the drivers with their seats. (dpa)