Sleeping, not sailing, key to victory, says Vendee Globe doctor

LES SABLES D'OLONNE, France (Reuters) - The biggest challenge facing the Vendee Globe's solo round-the-world racers is sleeping not sailing, according to the gruelling event's doctor Jean-Yves Chauve.

"The big challenge is to be on your own for more than two months," the 67-year-old Chauve, who has been involved in every Vendee Globe since its inception in 1989, told Reuters on Thursday.