How many running shoes are sold each year world wide? Who was the oldest person to complete a marathon? Want more running knowledge? Check out these 10 interesting facts you probably didn't know about running. LIKE this video & watch the last episode: http://youtu.be/M4vQmZ20sPE Lunden's Facebook Page: http://facebook.com/LifeLikeLunden Subscribe and get other great workout and fitness tips: http://bit.ly/rtFitness