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http://exercise.about.com/cs/cardioworkouts/l/blcardiointense.htm

These are the public entries for this link:

• Cardio Intensity Interval Workout
  
  This Interval Training Workout includes both sprints and hills to burn calories and build endurance
  exercise hills intensity interval intervals speed training workout
  By irishdancer0215 in Public bookmarks with bookmarks cardio

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