What's Your Favorite Form of Cardio For 2009?

What's Your Favorite Form of Cardio For 2009?

We all have a go-to cardio activity we crave, not only because it's enjoyable, but also because it energizes us and burns major calories. I run and swim regularly, but cycling has my heart of hearts. I'm starting to look back at the year, questioning you about the best of 2009, so tell me, which form of cardio should receive this title?

Source: Getty
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