If it actually works, the photo of Charles Wayne Humble in the article looks like he could lie through his teeth while passing a polygraph exam with flying colors!
https://en.wikipedia.org/wiki/Arpanet_(The_Americans)
After consulting with Arkady and Oleg, and with the promise of coaching from Oleg, Nina tells Stan that she will take the FBI's polygraph test. Oleg suggests a few techniques including that she visualize him in the room as well as clenching her anus.
https://www.youtube.com/watch?v=s3OMSMq9zPA
The Americans Season 2 Episode 7 "Arpanet" Review: "I like when I learn something from an episode, and now I know ..." "If you're having to do a polygraph, squeeze your anus."
https://tv.avclub.com/the-americans-arpanet-1798180091
(One of the ways to beat a polygraph turns out to be clenching one’s anus. This show is full of helpful hints.)
https://www.esquire.com/entertainment/tv/a28316/spy-on-the-a...
ESQ: The show featured Nina learning to beat and eventually beating a polygraph. How easy is it to do that?
PE: We have a number of real-world instances. The Aldrich Ames case. He went through the polygraph twice, after he went to work for the Soviets. Administering a polygraph is an art, not a science. That's why it's not admitted in court. People have claimed to have had training to beat the polygraph. Everything from tightening your sphincter to breathing a certain way, and so forth.
ESQ: Speaking of sphincters, the trick she's told is "squeeze your anus." Is that a thing?
PE: I can't confirm. [Laughs] I took several polygraphs. Taking them is a standard thing in the intelligence life.