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Exercise classes with the AbStar Core Trainer - showing V-crunch

Engage the Core

Exercise classes with the AbStar Core Trainer - showing back extension

Work Every Side

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Inner Thighs

Exercise classes with the AbStar Core Trainer - showing weighted ab twists

Safely add Weight

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Add Variety

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Hit Every Core Muscle

Class Videos Coming Soon

Exercise classes with the AbStar Core Trainer - showing push ups on knees

Add Instability to Your Exercise

Exercise classes with the AbStar Core Trainer - showing push ups on toes

Challenge Yourself

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Squeeze for Strength

AbStar Core Trainer 1

About the AbStar Core Trainer

  • The patented AbStar Core Trainer (aka AbStar AIR) revolutionizes inflatable core fitness trainers.
  • Creates a safe unstable exercise surface that vastly improves upon big, bulky exercise balls.
  • Makes core exercising more efficient, safe, and fun.
  • Core exercising on an unstable surface may enhance muscle recruitment and benefits* for most exercisers.
  • Easy to carry, move and store.
  • Supportive, compact, and only inches high means it’s safer for your members.
  • Never re-pump, because the AbStar Core Trainer’s industrial strength valve prevents air loss.
  • Convenient, lightweight, one size fits all.
  • Great for group fitness classes and personal trainer use with clients.

Why Exercise on an Unstable Surface?

From Applied Physiology, Nutrition, and Metabolism, 2010, 35(1): 109-112, https://doi.org/10.1139/H09-128

“The use of instability devices and exercises to train the core musculature is an essential feature of many training centres and programs. It was the intent of this position stand to provide recommendations regarding the role of instability in resistance training programs designed to train the core musculature.

The core is defined as the axial skeleton and all soft tissues with a proximal attachment originating on the axial skeleton, regardless of whether the soft tissue terminates on the axial or appendicular skeleton. Core stability can be achieved with a combination of muscle activation and intra-abdominal pressure. Abdominal bracing has been shown to be more effective than abdominal hollowing in optimizing spinal stability.

When similar exercises are performed, core and limb muscle activation are reported to be higher under unstable conditions than under stable conditions. However, core muscle activation that is similar to or higher than that achieved in unstable conditions can also be achieved with ground-based free-weight exercises, such as Olympic lifts, squats, and deadlifts. Since the addition of unstable bases to resistance exercises can decrease force, power, velocity, and range of motion, they are not recommended as the primary training mode for athletic conditioning.

However, the high muscle activation with the use of lower loads associated with instability resistance training suggests they can play an important role within a periodized training schedule, in rehabilitation programs, and for nonathletic individuals who prefer not to use ground-based free weights to achieve musculoskeletal health benefits.”*

*Bold type and paragraphs added by AbStar Fitness.

Benefit by Using the AbStar Core Trainer

In lay terms, the before-mentioned research study abstract means that the vast majority of exercisers can benefit from using a safe, unstable surface to enhance muscle use and recruitment. It means that you will use more muscles during our exercise classes and you will use them differently at each moment due to the unstable base of the AbStar Core Trainer.

Although similar benefits can be achieved by using heavier weights or more active, sports-inspired actions, AbStar exercise classes are designed to minimize detrimental impacts on the body while maximizing positive effects. Thus, using lighter weights with the AbStar Core Trainer along with other total body exercises can give you similar benefits more quickly and safely than using heavier weights or high-impact-type exercises. That makes our classes safe and effective for every participant.

See your doctor before beginning any exercise program. By using this site, you agree to our terms of use.

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Add AbStar to Your Gyms

If you choose to license our AbStar trademark for use in marketing, class schedules, advertising, and other communications, you would owe us a low $5 monthly fee for each of your locations. In addition to the many benefits of using the AbStar trademark, we will list your gym's name and website address on our company website. Please respect our trademarks.

Our low gym price for the AbStar Core Trainer is $35 each for an order of ten or more, plus at-cost shipping and sales tax if any. Orders of less than ten core trainers can be purchased by clicking here.