Exercise shown more effective than drugs for depression, schizophrenia

That is not the content of the article. It just states that they put a gym in the inpatient facility, and people's mood improved.

"MORE" effective? No claim of that. The original paper title is: "Positive patient response to a structured exercise program delivered in inpatient psychiatry". Its irresponsible to suggest that exercise alone will help everyone - as someone struggling with treatment resistant depression, exercising even 5 times a week didn't do what a low dose antidepressant did. Sometimes it IS chemical.

Studies ratimg the effectiveness of psychotropic drugs, and any treatment, are plagued by the problem that no rigorous diagnostic method can tease apart the myriad illnesses lumped into each DSM category.

So, anytime you want to check a treatment, you round up a few dozen depression or schizophreia sufferers and dose them. Lo and behold, only a few do better, because those were the only ones who had the actual problem it helped. All the others need something else. But it gets rejected, because it "doesn't work".