NEW YORK CITY (WABC) -- More than 50,000 athletes will be taking part in the 2016 TCS New York City Marathon.
Among the runners is Genevieve Shaw Brown, a mother raising money for Down syndrome awareness.
As if running a marathon isn't hard enough, she's going to be doing something a little tricky -- changing her shirt -- at each mile marker.
Check out the video above to learn more about her message.
Mom runs 2016 TCS New York City Marathon to honor son with Down syndrome
2016 TCS NEW YORK CITY MARATHON
More TOP STORIES News