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Florida fitness guru Teresa Tapp promises you’ll shrink two sizes in four weeks if you follow the moves in her new book “Fit and Fabulous in 15 Minutes.”

Tapp emphasizes shedding inches, not pounds. Originally designed for models, her combination of yoga, Pilates and more incorporates no weights, running or jumping, yet it’s demanding enough to increase the heart rate and break a sweat.

Tapp stresses proper posture to ensure an effective workout. The book’s detailed instructions include form checks and warn of common mistakes. A 15-minute DVD that comes with the book focuses on flattening the stomach without doing sit-ups; at t-tapp.com.