FOR Business. Canton, MA 11/8/2011 Peggy Baker (cq), 2nd from right, warms up before a 6:30am CrossFit class. Baker says she has lost 50 lbs. since starting the class in May. Reebok employees workout during a CrossFit class at their offices in Canton, MA on Tuesday, November 8, 2011. (Yoon S. Byun/Globe Staff) Section: Business Slug: 11reebok Reporter: Jenn Abelson LOID: 5.0.517326336