why is it ?

[Maverick]

that when I do dumbell curls it is harder doing both arms at the same time.. then it is doing alternating dumbell curls ?

 

[jaybois]

I have the same problem, great question.

 

[OMEGA]

More Energy Expenditure and more CNS activity, also dealing with more gravity

 

[Maverick]

hmmm please explain further

 

[the_alcatraz]

I agree with OMEGA with the fact that you have more resistance to gravity when you do both arms...

 

[jroy19]

basicall its easier for your body to lift one at a time than it is two dumbells even tho there the same weight

 

[kiosk]

counter-balancing

 

[squatpuke]

also it's easier to cheat/rock w/1 hand...

 

[tehkevroy]

one dumbell is easier to CHEAT like this guys telling u ^

 

[SouthernLord]

Try curling a oly bar, but one arm at a time. Grab the bar in the middle and try not to cheat it up. There isn't to many bicep isolation (I hate the term isolation) that will put more of a demand on your CNS and rock your grip like this exercise.