article_snippet: I have an issue with my eye when I sweat a lot,Rosberg Rosberg began.
article_snippet: With air temperatures in excess of 30 degrees Celsius and humidity levels over 70 per cent, the 90-minute race is a gruelling experience for the driver.
article_snippet: the 90-minute race can  lose up to four litres through sweat.
article_snippet: Temperatures are forecast to be 36 degrees Celsius for the 90-minute race, the second of the championship.
article_snippet: Temperatures are expected to nudge 36 degrees Celsius for Sunday’s race with a humidity of 75 per cent.
article_snippet: Rosberg added: ‘the 90-minute race is one of the toughest on the calendar because of the intense heat and humidity, so you have to be very fit. '
article_snippet: It is vital to stay hydrated, too because during the 90-minute race I can sweat up to four litres which is massive and probably double the amount of a regular race.
article_snippet: By the end of the grand prix, your concentration levels will not be as high as your concentration levels were at the beginning.