Steve Zim

Personal trainer Steve Zim has worked with Hollywood stars, professional baseball players and boxers, and Olympic hopefuls. Founder and owner of Los Angeles’ hottest gym, “A Tighter U,” Zim is the trainer most often called upon by high-powered sports agents on behalf of their clients.

Mark Laska is a professional writer and publicist and co-author of The Pilates Powerhouse and Body-Fat Breakthru! He lives in Los Angeles.