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Long, boring workouts aren't the best way to lose weight. "How long
you work out isn't as important as how strong
you work out," Warner says. You can get great results from a short (10- to 20-minute) high-intensity workout, making it easy to fit exercise into your busy schedule. Try Jackie Warner's 20-minute calorie blasters
to ramp up the intensity of your workout.
Celebrity Trainer: Jackie Warner’s Top 10 Diet and Fitness Tips