In the 80s and 90s there was a lot of JW Quacker's praising what they called kinesiology. It had nothing to do with the real science of physical movement.
One popular way of proving their "science" was to show you how bad common medicines were for you.
They would ask you to hold a bottle of Tylenol or Advil, aspirin or whatnot and extend your arm up parallel with your shoulder then they would put pressure on your arm to test for resistance. Then they would repeat the test without anything in your hand and more often than not you "experienced" a weakness of your strength in holding your arm out when you held the medicines in your hand.
They would share with you how in Brooklyn they practiced this kinesiology and that's why the GoBos were living into their 90s and blah blahblah.
It got pretty bad and there was a local talk about not giving medical advice if you were not a doctor. But it still went on, feeding on the distrust of modern medicine and encouraging folks to buy "holistic medicine" concoctions and "deep massage" treatments.