Any non hack psych will tell you to go outside and take a walk. Meds are a minimal solution

If your brain has a local metabolic failure leading to the inability to replete neurotransmitters, how taking a walk is a solution to your problem? You need to improve energetics first. Or what if some virus/auto-antibody is occupying some receptors in the brain, messing it up? Pushing the brain would likely just exacerbate the underlying failure.