A group of white-collar females do pilates during break time of their work at a Yoga club in Fuzhou, East China's Fujian province on June 2, 2010. Pilates is a popular fitness system developed in the early 20th century that focuses on the core postural muscles which help keep the body balanced and which are essential to providing support for the spine. In particular, pilates exercises teach awareness of breath and alignment of the spine, and aim to strengthen the deep torso muscles. [Photo/Asianewsphoto]