Shvitz! is real. It's available as a DVD from the Workmen's Circle website and as a VHS tape format from Amazon.com.
Veteran actress of the Yiddish stage Shifra Lerer explains and demonstrates exercises for beginners. Betty Silberman and Yekhiel Geller-Katz exercise along with you, demonstrating variations for the advanced exercise buff. Klezmer background music adds a fun Yiddish tam to your exercise program. English subtitles are included.