Designed by a former world-class middleweight boxer, here is the fitness crossover sensation of the '90s--a cardiovascular and toning exercise program that channels the aerobic intensity of a boxer's workout into an exhilara...

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Designed by a former world-class middleweight boxer, here is the fitness crossover sensation of the '90s--a cardiovascular and toning exercise program that channels the aerobic intensity of a boxer's workout into an exhilarating non-contact fitness program.