Because sumo wrestlers are very big and over weight, they can suffer from diabetes, heart, bone and joint problems.
"Whether they [young sumos] stop wrestling at a very early or late age they're very likely to have diabetes and heart disease.
"Unless the diabetes is attended to there is a very good chance they will not live as long as they ought to," explained health expert Hugh Davies.
Sumo's feet also suffer. They're often covered in plasters where they have hurt their feet stamping as part if the fighting ritual.
Warriors also use their feet as brakes when they're in the ring, and this can damage them.