A young boy from Nashua, New Hampshire, started running to improve his health and lose weight. With that goal in mind, 7-year-old Thomas Cantara took part in his first marathon in 2012. But after reaching mile 22, severe cramps forced him to stop. But still, Cantara chose to keep going. Running helped him lose more than 80 pounds and opened up opportunities he never imagined. Fourteen years later, the athlete who once struggled to finish a marat…