Exercise is shown in a number of clinical studies to benefit people who have ADHD, depression, anxiety, etc.<p>You know one thing those studies do, though, that we don&#x27;t on HN? Screen every participant to make sure they qualify. Those screening tests take out people who don&#x27;t meet clinical definitions of (ADHD, depression, anxiety, etc.), screen out people with physical problems that prevent them from completing the protocol, and then track participants.<p>Exercise is good medicine, but it&#x27;s not the only one -- and the parent post here points out that sometimes it isn&#x27;t the answer at all. For an anecdote I&#x27;ll pull out a friend diagnosed as &quot;just depressed&quot; -- stomach hurt, some tough family situations. &quot;Exercise! It&#x27;ll help!&quot; All the running, swimming, rock climbing in the world didn&#x27;t really help. You know what did? Two surgeries to take care of the endometriosis that wasn&#x27;t diagnosed for 6 years.<p>We&#x27;re complex creatures. Try exercise: it&#x27;s cheap, don&#x27;t need a prescription, might have benefits esp if you form more social ties while you&#x27;re at it. If it doesn&#x27;t help, don&#x27;t ignore that -- keep looking!