This version is useful for
when you'r either not strong enough to do the feet-up version
where you're using your entire bodyweight for resistance
or you're just too tired to do enough reps to really get
much out of it.
It's basically the exact same
exercise as above only instead of setting the bars up high,
you set them a bit lower so you can keep your feet on the
ground and spot yourself by standing up when you need help!
The Nilsson Curl is basically
a chin-up with your forearms braced up against another bar.
When you have your forearms braced, it throws the majority
of the tension of the chin-up directly onto the biceps -
much more so even than chins done with your body vertical.
Stopping the forearms from
moving forward is what does it - the difference between
this and a regular chin-up is just AMAZING. You'll feel
ALL the tension go right into the biceps.
So here's what the standing
version looks like. You can do this in rack, using the set
up I have here or you can use the safety rails in the rack
- just set the two rails into one side so they look like
ladder rungs - it'll give you the same effect.
With this version, I have
a bar setting in the racking pins and a bar sitting on top
of the rails. I have the weight on the top bar to help keep
it from moving. You want about a foot spacing in between
the two bars.
You'll be gripping the top
bar and bracing your forearms on the bottom bar.
So stand in front of the bar
and get a grip - a little inside shoulder width - underhand
grip.

Set your feet a little forward
then squat down.

Now pull yourself up, as though
you were doing a chin-up. Use your feet only as much as
you need to for help. The majority should be bicep pull.

Pull all the way to the top
and squeeze your biceps HARD.

Lower and repeat. Use help
from your legs only as much as you need to. You can also
use this setup to do negative reps, standing up on the positive
and taking your feet off the ground to use your full bodyweight
on the negative.
Your biceps will be on fire
after a few sets of this one - a bodyweight bicep exercise!