I call these "Z Curls" and I'm doing them with my "10%" nervous system hack to help get the last few reps.

I wanted to take changes in body position and body movement out of the equation to really test it.

I did a video on that hack a few weeks ago - click here to watch it...

Essentially on the last rep or two of your set (with alternating dumbbell curls), when you can't do another rep and hit the sticking point, do a partial range kickback with the other arm.

The cross-connection activation in the brain increases nervous system drive to the working side.

There were a lot of people questioning this, believing it was due to a change in body position rather than nervous system activation.

Hopefully this helps clear it up - no back angle changes and no leg assistance possible with this setup.

I call the base exercise a Z Curl, not because that's an official name but because the position is essentially the same as the Z Press, pioneered by strongman legend, Zydrunas Savickas (though his press doesn't use back support).

The bench is set right up against the upright of the rack so that I'm forced to maintain a vertical back position and legs are set straight out on the bench to take legs fully out of the equation.

Watch the full video of it on YouTube here!

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Nick Nilsson
The Mad Scientist of Muscle

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