1. 
   Cardio
   Usually refers to activities that increase your heart rate.
   Found op http://www.fitwatch.com/glossary/activity.html
   
   
2. 
   Cardio
   [album] Cardio is the 18th studio album By Latin Grammy-winning Spanish musician and actor, Miguel Bosé. It was released in 2010. Cardio spent seven weeks on Billboard Magazine`s Latin Pop Albums chart, peaking at #3, and five weeks on the Latin Albums chart, peaking at #7. ==Track listing=...
   Found op http://en.wikipedia.org/wiki/Cardio_(album)
   
   
3. 
   cardio
   1) Healthful exercise, informally 2) Part of many workouts, informally
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/cardio/1
   
   

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