Health & Fitness: Exercise in Best-Selling Lesson 3:

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Callanetics' subtitled claim--"10 years younger in 10 hours"--strikes many specialists in the field as a bit too much of a miracle. "Fat loss is a very long-term process," says Chicago Physiologist George Lesnes. St. Louis Chiropractor R. Alexander Rojas agrees but is impressed nevertheless: "There's something for everyone in this book." Pinckney's biggest fan is her mother. Now 76, with arthritis, she does two hours of Callanetics daily and looks as trim as her 46-year-old daughter. The author does an hour a week, in her book enough for most people. "I hate exercising," she groans. "It's a bore and a drag." Not like book publishing.