If you’ve seen the video of me lifting the Toyota you might have noticed the noise I make when I do maximum lifts. The fact is, I don’t think I could do a big lift like that if I had to be silent. First of all, it’s important to exhale during any heavy lifting – static contraction or otherwise – and although it’s possible to exhale silently, I’ve always preferred making a loud noise. I refer to this inarticulate grunt as a “Barbaric Yawp” in deference to the great poet Walt Whitman who wrote: “I sound my barbaric YAWP over the roofs of the world.”
While I certainly lack the grace and insight of a poet, it does turn out I’m onto something. Back in 1960 physiologists Michio Ikai  and Arthur Steinhaus published a study entitled Some Factors Modifying the Expression of Human Strength. They looked at some external factors that could affect a person’s strength performance. Basically they looked at a loud noise, the subject’s outcry (barbaric yawp), amphetamines, alcohol, adrenaline and hypnosis.

They sat a subject in a chair and fastened a cable to his wrist with a wide strap. When the second hand of a clock reach a given point the subject pulled against the cable in what amounted to a static contraction (isometric) biceps curl. Readings were taken from a tension meter connected to the cable.

The subjects given alcohol and adrenaline had improvements considered statistically insignificant. The most profound effect was from hypnosis where the subjects were given the suggestion of either feeling great strength or of great weakness. These subjects demonstrated either 26.5% more or 31.7% less strength while hypnotized. (!) Subjects given amphetamines saw a 13.5% improvement. Subjects who had a starter’s pistol (firing blanks) shot unexpectedly while lifting had a 7.4% increase in strength. And the subjects who shouted during their exercise garnered a 12.2% increase in strength.

For most of us, taking amphetamines, having a personal hypnotist at the gym with us or firing off a handgun during our leg press is just not going to be practical, to say the least. But the cheap and simple act of yelling your own Barbaric Yawp during your 5 second static exertion might well garner a 12.2% increase in your performance. Wow!

The researchers suggested that this phenomenon might be explained by acting to remove internal inhibitions. Somehow the Vikings must have known that when they ran ashore, bare-chested wielding battle axes and screaming their own, truly barbaric, yawp. But you can get the same benefit without the messy bloodshed.


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  • HI Pete, we have communicated by e-mail a few times before. I wonder if you would let me put a part of this post on my own web-site at http://www.gfilotto.com as it is very relevant to my field of hypnosis.
    I would of course give you full credit for the article and place a permanent link to your site. I am also going to be re-designing my site soon and planned to have a permanent link to you anyway because your stuff is the only one I know that "does exactly what it says on the tin!" A line I used in an e-mail to you and you asked me if you could use (of course you can!).

    Should you wish to add a link to my site too that would be great as we would both benefit from the increased SEO, but I'll leave that up to you.

  • StaticContrac

    Hi, Giuseppe. Nice to hear from you. You can use the article on your website as long as you link it back to PrecisionTraining.com. Thanks. I don’t link to products that I have not personally used.

  • mac

    I used to scream when I did heavy, 1RM lifts. While I am not contradicting you –it certainly beats self-conscious, inhibitive silence–I want to caution that if you should become totally uninhibited in this practice you may strain your vocal cords.

  • admin

    Hi Mac! I don’t see any contradiction, I agree with you.