Athletes' tattoos

Michael Phelps has two tattoos peeking out of his trunks - one of the Olympic rings and the other an M for the University of Michigan.

Anastasia Davydova (L) and Anastasia Ermakova of Russia prepare for the synchronised swimming duet free routine final at the Beijing 2008 Olympic Games August 20, 2008. The Russian pair defended their Olympic duet title.

US cyclist Adam Duvendeck sports a tattoo featuring the Olympic rings during a training session at the Laoshan velodrome, at the Beijing 2008 Olympics in Beijing.

Pictogram tattoos of the disciplines of the decathlon are seen on the legs of Andrei Krauchanka of Belarus during his pole vault event of the men's decathlon in the athletics competition in the National Stadium at the Beijing 2008 Olympic Games.

A tattoo is seen near the ankle of Natalia Valeeva of Italy as she competes in the women's archery individual ranking round at the Beijing 2008 Olympic Games.