What Is It: Speedplay is a 60-minute high-intensity interval training class that combines running, rowing and floor exercises to burn up to 900 calories per session. Who Tried It: Gabrielle Olya, ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. ST. LOUIS – Co-owner and Instructor Kristen ...