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    Ready for Marine Corps Marathon?

    William Aris, elizabtheastman, and 20 other people added this photo to their favorites.

    1. Classes and Careers 53 months ago | reply

      I knew there was more than one reason why I hate running - there's so much that goes into it! Very informative though, I never thought that bone density would be a factor.

    2. sfisher71 35 months ago | reply

      FANTASTIC. Thanks for sharing this. The "Fuel efficiency" section explains where I need to go with my own running.

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