Sports band Puma has linked up with two-time Golden Glove winner and "Biggest Loser" trainer Cara Castronuova to launch a new PowerCore collection. The women's training collection, which goes on sale next year, focuses on strengthening and enhancing a woman's core muscles.As part of the long-term relationship, Castronuova will appear at several consumer and press events representing the brand, including the company's first BodyTrain Together weekend, a full training and wellness weekend for consumers, in early 2012. The program includes development of a national women's training program that focuses on core work-out regimens that are also social.