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AbStar Fitness

Home of the AbStar Core Trainer

Benefits of Using the AbStar Core Trainer

  • Creates a safe, unstable exercise surface and vastly improves upon big, bulky exercise balls.
  • Makes core exercising more efficient and fun.
  • Core exercising on an unstable surface enhances muscle recruitment and benefits* for most exercisers.
  • Easy to carry, move and store, it’s great for use at home or in the gym.
  • Supportive, compact, and only inches high means you’ll never fear falling off.
  • Never re-pump, because the AbStar Core Trainer’s industrial strength valve prevents air loss.
  • Core exercise with the AbStar Core Trainer may help you reduce back pain and improve your balance.
  • Compact and lightweight, one size fits all.
  • Great for home exercisers, group fitness classes, and personal trainers.
Buy the AbStar Core Trainer Today!

Click on the images below to see just a few of the many ways to use the AbStar Core Trainer.

More effective ab crunches with AbStar
Super butt and shoulder exercise with AbStar
Push-ups on an unstable base with AbStar
Better push-ups with AbStar
Advanced bicycles with AbStar
Back extensions with AbStar to relieve back pain
Squeeze and lift for beautiful thighs with AbStar
Advanced abs and balance exercise with AbStar
Strengthen hamstrings and glutes with AbStar
Side bends with AbStar to strengthen your core
Moving planks with AbStar
Chest pumps with AbStar

Read why our Exercise Star is better than a ball.

Safe Exercise

With its patented rounded-star design, the inflatable AbStar Core Trainer offers a safe, unstable exercise surface for efficient exercising. Anti-burst with a 500 lb. rating, an anti-slip base, and no moving or metal parts, our exercise star is safer and more effective than a ball.

Achieve safe, effective core exercise at home or in the gym.

Effective Exercise

With its low-rise and compact size, the AbStar Core Trainer ensures you stay in the most effective positions for better core exercising. The unstable surface makes ab exercises, back extensions, side bends, and planks more potent, so you achieve your fitness goals faster.

It’s great for beginners and advanced exercisers alike.

Versatile Exercise

Using its unstable surface improves bodyweight exercises. Squeeze the AbStar Core Trainer and it will comfortably resist your force to help you build muscle and improve stamina. Work those inner thighs, pump those chest muscles, and strengthen your grip and forearms.

Improve strength, stamina, and stability with AbStar.

Why Exercise on an Unstable Surface?

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

“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 dead lifts. 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 added by Team AbStar.

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

Our Mission

Our mission is to help millions of consumers worldwide achieve safer, more efficient exercise by providing cost-effective, durable and innovative fitness products.

Customer Reviews

“LOVE my new Abstar Core Trainer! It’s the first time I have enjoyed doing abs in my workout. So much better than a ball, or working just off of the floor. Gives back support and still works out my abs thoroughly. Great for inner thigh squeezes and the lat pulldown position gives you stability while maintaining a great stretch.”


“I was pleasantly surprised with how simple and easy to use this product is. I definitely feel like I’m getting a solid workout with very little stress. It does feel very stable, too. A smart buy if you’re looking to get in shape or maintain good fitness.”


“I definitely got the best ab workout than I have from any other inflatable device. Love that it doesn’t roll out from under you. It feels easier to get and keep my balance on this core fitness trainer, unlike the large round balls. I spent more time trying not to fall off the ball than actually working out. Now I can spend a lot less time getting a safe, killer workout!”


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