When Bethany Lord learned four years ago that her son, Colby, had muscular dystrophy, she figured that ended his chances of playing organized sports. But Colby loved baseball, and he tried out for ...

Shuttle runs. Cariocas. Side shuffles. Hurdles. While dedicated agility drills were a mainstay of grade-school gym class, they may no longer be part of your workout regimen unless you’re currently ...