Roller Derby To Burn Calories

new trend. roller derby to burn calories. abc news did a whole story
featuring the la derby dolls and some roller derby fitness programs.
watch the whole story here:
(it is the last segment)
http://www.hulu.com/watch/439477#i0,p383,d0

for more information about S-One Roller Derby Helmets
 check out www.s-one.com