Chris Martin splurges huge sum on personal trainer?

London: Coldplay frontman Chris Martin has reportedly hired a 110 pounds-an-hour personal trainer in a bid to get in shape ahead of his new tour. Martin, 37, has taken up a boxing-based workout regime with an expert recommended by his rapper friend Jay Z, reportedly. "Chris is a big fan of boxing and loves nothing better than working out with a punch bag. Chris has been doing it for a little over a month now to get in shape for his forthcoming tour," a source said. "He doesn`t want ridiculous biceps, but he wants to build some definition in his skinny arms and improve his stamina," the source added. The band`s first gig to support album `Ghost Stories` was in Cologne, Germany last Friday with the next in New York on May 5. The singer recently separated from his wife of 11 years, Gwyneth Paltrow.