Douglas over at "Health Habits" recently put up a helpful post on
something I suspected for a long time...

Bosu Balls Are A Waste of Time!

http://tinyurl.com/bosu-balls

I have seen hundreds of personal trainers have their clients do
various workouts on these to work the core.

I always thought that this was a scam and now I have proof.

http://tinyurl.com/bosu-balls

He posts findings of a recent study done by Eastern Illinois University

Want to work your core? Then do exercises like "planks".

Doing dumbbell curls on a Bosu Ball to "work your core while working
your abs" will just ensure a poor bicep workout.

As Doug says over on his site:

MYTH BUSTED!