The Impact of Jenny Simpson
By Liam McHugh, NBC Learn
Many runners suffer injuries to their joints due to the repeated impact of their feet hitting the ground. U.S. runner Jenny Simpson relies on new treadmill technology to help rehabilitate from a stress fracture as she trains for the 2012 Summer Olympics. "Science of the Summer Olympics" is a 10-part video series produced in partnership with the National Science Foundation.
Watch the video at: nbclearn.com