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BOSU® Sport 50cm Balance Trainer

The sleek, compact design of the BOSU® Sport 50cm Balance Trainer allows for easy transportation and storage, quick positioning for any type of workout.

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The BOSU® Sport Balance Trainer 50cm (also referred to as the Half Blue Exercise Ball) is simply a smaller version of the original BOSU® Home Balance Trainer, constructed with the same rim and base style. The sleek compact design allows for easy transport and storage, quick positioning for any type of workout, and is ideal for all fitness enthusiasts and athletes. The smaller size offers a variety of configuration, stance and workout options, especially when paired with an additional balance trainer or BOSU® Ballast Ball.

It’s a great tool for all skill levels, but kids love the bright colors and smaller size.

  • Reshape your body
  • Tone & strengthen
  • Increase balance & agility
  • Enhance movement capabilities
  • Improve flexibility


  • Latex-free, burst-resistant material
  • 90-day limited warranty - Home use only
  • Available in blue or pink with neon green rim and black base
  • Six (6) rubberized feet       
  • Holds up to 113.40 kg (250 lb)
  • Weighs 4.54 kg (10 lb)
  • Measures 50 cm diam x 17.8 cm high (19.7 in x 7 in) when fully inflated
  • Includes hand pump and owner’s manual


Click Here for BOSU® Comparison Chart

Warranty Info

90 day limited for home usage only.


Customer Reviews 2 item(s)

Very difficult to inflate
Very difficult to inflate
Review by Carolyn / (Posted on 2/26/2018)
Smaller Version - Great for Kids
I purchased the Sport BOSU for my 7 year old son. He plays football, baseball and soccer. The 50cm BOSU has been great for him, since it's just right for kids. The height and inflation is perfect for him. His balance has improved a great deal.
Review by Leah M. / (Posted on 1/29/2018)

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