China's top female gymnast Cheng Fei is battling problems brought about by adolescence which might affect her performance at the Beijing Games.
Cheng, 19, is the country's most decorated woman gymnast. She is a two-time Chinese national floor exercise and vault champion.
She made history at the 2005 World Artistic Gymnastics Championships by completing one of the most difficult routines - a round-off, half-turn onto the vault, then a 540-degree twist in the laid-out position. This unique set of movements is officially named 'The Cheng'.
She gave an impressive performance on the balance beam as well.
Cheng hoped to become an all-round gymnast and her overall second place at the 2005 National Games highlighted her potential.
However, she has been concentrating on individual events over the past few years, mainly because of the changes in her body which have hampered her training.
