What are those blue flat bottomed balls called?

[ihatethecold]

They are like an exercise ball that's been chopped in half.
The base looks like it's non slip.
I really want one but have no idea what they're called.

Bosu ball
:)

Yay. Thanks, do you use one?

I want one too, they were really expensive though! I do crunches on one at the gym.

Bloody hell!
Why are they so expensive?
They're £90 on Amazon.
Oh well. Never mind.

I've only used then for a couple of exercises. very effective though.

• standing on one, flat side up while holding medium weights and doing bicep curls. good for the core.

• holding around the edge of the bosu, lift straight up over your head (ouch arms and core) then bring the bosu down to the floor (ball side to the floor) and while holding it do a squat thrust. then lift by back up over your head and down to another squat thrust..... repeat until you keel over .

Goodness knows, seemed really exessive to me. There's a running machine on there for about the same!

Excessive, even.