"balance ball" is correct and usable in written English.
The phrase can be used as a noun to refer to a type of exercise equipment used to help improve balance and stability. For example, "I like to use the balance ball to help strengthen my core."
Balance Ball Made of heavy-duty vinyl, the inflatable Balance Ball is a portable gym that can be used for stretching, toning and low-impact aerobics.
Marion violates nearly every precept of proper jump shooting — balance, ball position, arm extension, follow-through.
Reebok Gym ball: £14.99, John Lewis AA balance ball can help with all-important core strength.
"I swapped out my chair for a balance ball," said Lisa Mahoney, an associate marketing manager at the company.
Exercising along with the Balance Ball Fitness Workout video (35 minutes) or the Balance Ball Fitness Abs Workout Video (40 Minutes) is an excellent way to tune up and tone.
But with the merger hanging in the balance, Ball will certainly not want to show his cards yet.
Reebok introduced the shoes and their "balance ball-inspired technology" in 2009 with a tantalizing proposition.
In the far distance people bounced on balance balls and frolicked under a spray mist.
The idea for Reebok's toning shoes came from Bill McInnis, a former NASA engineer, who wanted to use the technology behind balance balls in shoes.
Occupational therapists' child clinics typically look like indoor jungle gyms, with an assortment of swings, mats, blow-up balance balls, blocks and other toys.
I heard of people who used rubber balance balls as desk chairs, but I knew that if the kneeling chair made me feel stupid a big rubber ball would be more than I could handle.
