There was no way on earth that l could have gone running or taken part in any form of physical exercise… Citalopram broke that cycle.
Now, in a survival situation a serious infection can only be treated with anti-microbial drugs and all the exercise in the world would never cure such an infection. However, in a life and death situation, a person can snap out of a depression mode instantaneously, do acrobatics and jump over crocodiles if need be. So, shocking the brain in one way or another is therapeutic to treat depression.
But the poem “The doctor’s story” doesn’t usually apply to treating depression as it doesn’t apply at all to treating organic diseases. All the fresh air and sunshine in the world won’t change your mood but the effort put in to change your mood like the strenuous effort to go out and exercise or the mental and emotional effort to change thought patterns is therapeutic instead of the physical activity itself. So, the flight mode is therapeutic and not the acrobatic moves it induces. I must say though that once the muscles start flexing and the blood starts flowing it also causes a positive change in brain chemistry.
Everything considered, under usual circumstances, the chemical approach to treatment is the best choice the way I see it.