When running, most of us face two challenges: our heart and lungs (conditioning); and our leg stamina. Either your “lungs or ...

Whatever your goals, even if you’re training to run long, it pays to go short—and fast.

On a typical weekday morning in Justin, Texas, hours before the first-period bell rings at Northwest High School—while most students are still waking up or catching the bus—Cooper Lutkenhaus and his ...