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[Articles & News] The biomechanics behind Michael Jackson’s impossible dance moves.

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Post time: 23-5-2018 04:09:43 Posted From Mobile Phone
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Some neurosurgeon fans decided to investigate.


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▼ Before reading the rest of this article, please first stand up and try to tilt your whole body forward at a 45 degree angle. You may only bend at the ankle. Assuming that you are not Michael Jackson, you will fail at this endeavor.
But why? Do you not have the incredible core strengthMichael Jackson possessed at his peak? Honestly, probably not, but even if you did you’d be unable to perform Jackson’s famous anti-gravity tilt from the music video for “Smooth Criminal.” And if you’re a true fan, you’ll already know why—but don’t worry, you’re still about to learn something cool.
This mysterious dancemove intrigued three neurosurgeons at the Postgraduate Institute of Medical Education and Research in Chandigarh, India, and being highly motivated individuals they set out to analyze whether it’s even physiologically possible to lean forward at 45 degrees while keeping your entire body rigid. They published their results in the Journal of Neurosurgery: Spine.
“Being an ardent MJ fan, I was always fascinated with his dance moves,” explains co-author Manjul Tripathi. “As a child, I tried them several times but failed miserably, especially with the ‘forward bending’ of ‘Smooth Criminal.’ During my neurosurgical training, I again got interested in this mystery move and found the trick.” Yes, Jackson used a little stage trickery to accomplish his fancy footwork—more on that in a minute. “But even with the trick, the movement is difficult to execute,” Tripathi says. So he decided to investigate the biomechanics behind such a movement.
As it turns out, the anti-gravity tilt is physiologically impossible. To understand why, stand up again—here comes some more audience participation.
When humans want to lean forward, we bend at the waist. In addition to having better flexibility, bending at the waist allows you to use your erector spinae muscles to, as the study authors put it, “act like cables to support the suspended spinal column.” This bundle of muscles runs from your hip to your neck and is responsible for straightening and rotating your back. By maintaining your center of gravity, they keep you balanced. Go ahead and try it: bend at the waist and notice how easy it is to keep your back straight and yet remain upright. (▪ ▪ ▪)

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Post time: 26-5-2018 23:58:19
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45 degree impossible tilt in smooth criminal
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