Without the mileage, goalkeepers need to keep a close eye on what they eat. Get too heavy and they will find it that bit harder to fling their body weight across goal to reach a shot.
More after the break
Goalkeepers have to be light on their feet and alert, which is why Blackburn goalkeeper Paul Robinson tailors his pre-match meal for the demands of his position.
"I don't like to eat on the morning of a game. I like to go into the game feeling as empty and as light as possible," the former England goalkeeper told FFT.
"I'll just have two or three double expressos, a little bit of fruit and maybe a handful of nuts."
Find out more about a Premier League goalkeeper's diet by watching this video.
Paul Robinson is an Under Armour-sponsored athlete: for information, visit underarmour.co.uk
Paul Robinson: Psychology for goalkeepers
Winning a one-on-one: a 3-step guide
Paul Robinson's essential goalkeeper drills
Paul Robinson's guide to saving penalties
In the gym with Paul Robinson
Summer fitness plan for goalkeepers
Paul Robinson: Summer fitness
Paul Robinson: Prepare for pre-season