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(Dr. Jeff Willardson). Alright, now we're back again
with another biceps exercise, and this one we're going to do
in the seated postion on a stability ball.
The advantage here again is we're trying to incorporate
contraction of the core muscles here.
Core muscles are very important, and actually you really don't
need to do a lot of abdominal exercises if you're doing your
other exercises correctly.
You can program variations in each exercise to more
effectively contract the abdominal muscles.
With this exercise the key is to bring the feet close together.
What that does is it prevents the legs from getting in the way
of the weights but also creates greater challenges to balance.
Notice that Cara's posture is nice and tall, just as if she
was sitting up against a wall, and she's going to use
the same technique.
A little bit of elevation in the shoulders, flex at the
shoulder joint, and then she's just dynamically working
that curl movement.
As you can see, the weights gradually come up, she's turning
her palm out to most effectively contract those bicep muscles.
So anytime you can use dumbbells on this exercise, that would be
the preferable method over just a traditional straight bar
where your hands are more restricted in their movement.