Add Yahoo as a preferred source to see more of our stories on Google. Thirty-three Swifties scream-shout the lyrics to Taylor Swift songs, but not in a stadium or at a therapy session. They're doing ...

Thirty-three Swifties scream-shout the lyrics to Taylor Swift songs, but not in a stadium or at a therapy session. They're doing it in a workout class. Welcome to Swiftie Liftie, a rhythmic, full-body ...