Before stimulant drugs such as Ritalin, Concerta and Adderall began their rise to popularity in the 1970s, treatment for attention-deficit hyperactivity disorder (ADHD) focused on behavioral therapy.

To crush long distances (think half marathons and marathons), you don’t just need a solid training plan. You need a certain level of grit—and by grit, we mean you must be willing to show up to your ...