A libertine tortoise had so much sex he developed arthritis has been fitted with wheels so he can get around.

The shelled seducer is a 22-year-old African spurred tortoise named Bert who resides in Norfolk, England at the Secret Animal Garden in the Dinosaur Adventure Park.

His handlers noticed that his movement was restricted due to swelling in his left rear leg after he came back from a breeding buffet in 2011.

During his sex-capades, Bert had mated with five female tortoises, producing dozens of babies. The arthritis is a result of his romping, his handlers say.

Martin Hocking of the animal park told the Daily Mirror: "He is a lover not a fighter, that is certainly true. I wasn't there for the whole time [he was away] but I imagine he was quite interested in the female tortoises.”

Hocking added: "African spurred tortoises are prolific breeders who can produce up to 60 to 70 offspring a year and he is no exception."

As a result of his amourous antics, Bert was fitted with heavy wheels to help him glide around.

"The wheels help Bert's mobility and will hopefully help him heal by aiding circulation,” park operations manager Adam Goymour said, adding "Kids love it and think he is a bionic tortoise and that he needs those wheels to help him with his super tortoise speed."