My ADHD symptoms have been drastically reduced after running daily for the past couple of months.
Even while using medication, running improves results on top of what I had been seeing. It also helps to have a physical challenge to complete every day in order to maintain a routine.
For my body, I need about 90 minutes of challenging physical exercise every day, or I start to seek stimulation in any form I can find, which is usually distracting from my primary goals.