Singer Madonna is fed up of husband Guy Ritchie's martial arts obsession and doesn't want her children exposed to violence.
Said a source, according to ananova.com: "Guy says Madonna always complains that he spends every spare second down at his local centre fighting - but he'd never give it up."
Ritchie practises with the bodyguards because most of them are also jiu-jitsu fans and they all practise at the mansion.
The source added: "He turns up at the martial arts centre at the end of the very hardest class - just for the fights. He says it's the only thing that de-stresses him."
Ritchie in an interview admitted: "I tried yoga for six months and it's not for me. I do judo or Brazilian jiu-jitsu, where men grapple one another while wearing Speedos in mud. No, that's not true, but it's a sort of sophisticated wrestling."