Annual Savage Seven marathon series -- seven races in seven days in Florida between Christmas and New Year's -- is just a nice "vacation" for some diehard runners

Seven marathons over seven days isn't a dream vacation for most people, but for some dedicated distance runners, the annual Savage Sevens series in Florida is a nice way to spend the holidays ... and certainly an effective way to keep off the holiday pounds. My story for ESPN.com's Endurance Sports section: http://espn.go.com/sports/endurance/story/_/id/10171212/endurance-sports-savage-seven-marathons-bring-holiday-fun-florida