Flat stomach tips from the stars
How do celebs keep their washboard stomachs?
Cameron Diaz: surfing
'A brilliant all-over workout, surfing's especially good for honing a super toned tum,' says Zest's fitness expert Jon Stratford.
'You're constantly engaging your core muscles to keep your balance on the board, so you'll really feel it the next day and, because surfing is also a great fat burner, you should notice results quickly.'
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