The gym ball is a simple and versatile piece of equipment found in almost every type of training setting: from postural correction to advanced core training, from Pilates to active sitting in the office or studio.
Available in a range of diameters to suit your height and intended use
Standard and Active Sitting versions for prolonged use at a desk
Dedicated accessories: dual-function pump and gym display

0419 Dual Function Pump

Fitness balls

0419 Dual Function Pump

7,63€ FEES and TAXES NOT INCLUDED
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0428-0446 Gym Ball

Fitness balls

0428-0446 Gym Ball

10,68€ 28,21€Fascia di prezzo: da 10,68€ a 28,21€ FEES and TAXES NOT INCLUDED
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0448/5-0448/9 Sidea Active Sitting Ball

Fitness balls

0448/5-0448/9 Sidea Active Sitting Ball

70,00€ 49,00€ FEES and TAXES NOT INCLUDED
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0459 Gym ball display

Fitness balls

0459 Gym ball display

12,20€ FEES and TAXES NOT INCLUDED
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Gym balls: the Sidea selection

The gym ball — also known as a Swiss ball or exercise ball — is one of the longest-standing and most versatile pieces of fitness equipment. What the products in this selection have in common is the use of an unstable surface as a means of activating the deep muscles, stimulating the proprioceptive system and improving postural control. Sidea offers a compact yet comprehensive range: the Fitness balls It includes the classic Gym Ball in various sizes, two versions of the Active Sitting Ball, and all the accessories needed for gym use, from storage to inflation.

Who is the gym ball for?

The range of people who regularly use a gym ball is wider than you might think. It is not just a piece of equipment for rehabilitation or group classes.

Strength and conditioning coaches and personal trainers incorporate it into warm-up routines and core stability circuits, particularly when working with athletes who have weaknesses in the posterior chain or poor lumbar-pelvic control. Exercises such as the ball rollout, the bridge with feet on the ball or the dynamic hip extension require a level of motor control that is difficult to achieve on stable surfaces.

Physiotherapists and wellness practitioners use it during the functional rehabilitation phase: its appropriate diameter allows for partial weight-bearing exercises, with controlled ranges of motion and immediate sensory feedback.

Pilates studios and holistic training centres see the gym ball as a natural extension of their mat-based work. The category Holistic Training Sidea brings together precisely these tools with a view to an integrated mind-body approach.

Anyone who spends many hours a day working in an office can benefit from the Active Sitting Ball: used as a dynamic seat, it keeps the postural muscles active and reduces pressure on the spine compared to a traditional chair. It is not a substitute for a professional ergonomic chair, but it is a useful addition for those who wish to incorporate passive movement into their working day.

Home gyms and garage gyms: compact, affordable and highly versatile. A 65 or 75 cm gym ball covers a significant proportion of core exercises that would normally require more complex equipment.

How to choose the right gym ball

The choice of diameter is the first factor to consider. The general rule is that, when sitting on the ball with your feet flat on the floor, your knees should form an angle of around 90° or slightly more. As a guide:

  • 55 cm — height up to approximately 165 cm
  • 65 cm — height between 165 and 180 cm
  • 75 cm — height over 180 cm or for exercises requiring a larger contact area

For the Active Sitting Ball, the choice of diameter follows the same criteria, with additional consideration given to the height of the work surface: the correct relationship between the seat and the desk is crucial for avoiding postural compensations.

Load resistance is another factor to consider, particularly in professional settings where the ball is used by multiple users of different body weights. Sidea gym balls are made from burst-resistant material, which, in the event of a loss of pressure, deflates gradually rather than bursting.

If the ball is intended for a gym or a studio with multiple users, it is also worth considering a storage solution: the Gym Ball Display allows you to organise the balls neatly on the wall or on the floor, making them quick to access and freeing up valuable floor space. This type of solution falls into the category Rack tool by Sidea, designed to optimise tool management in professional environments.

The pump is often underestimated. A dual-function pump — which inflates and deflates — is the only practical tool for regulating pressure over time and for routine maintenance. A correctly inflated ball behaves differently to an over-inflated one: the contact surface changes, and with it the perceived difficulty of the exercises.

Sidea products for gym balls

The range comprises five distinct products, each with a specific function:

Gym Ball 0428-0446 — the classic exercise ball, available in a range of diameters (from 45 to 85 cm). Suitable for gyms, personal training studios, rehabilitation centres and home use. Burst-resistant material, suitable for use in Balance training and core stability programmes.

Sidea Active Sitting Ball 0448/5-0448/9 and 0448/5V-0448/9V — a version designed for active sitting. Available in two versions (standard and with a different finish), in sizes ranging from 55 to 95 cm. Suitable for offices, professional practices, classrooms and environments where people spend many hours sitting. The slightly flattened base ensures stability when stationary without restricting micro-postural movement.

Dual Function Pump 0419 — a dual-function hand pump for inflating and deflating. An essential accessory for maintenance and pressure adjustment. Compatible with all balls in the range.

Gym Ball Display 0459 — a ball rack for display and organised storage in a gym or studio. It allows you to store multiple balls of different diameters in a compact space.

Why choose Sidea

Sidea has been sourcing and distributing professional fitness equipment since 1999. With over 25 years of direct experience in the sector, a 4,000 m² warehouse and accessible technical advice, the company caters to both professional facilities — gyms, box clubs, rehabilitation centres, schools and public bodies — as well as enthusiasts looking for professional-grade equipment for their home gyms. The gym ball range forms part of a wider catalogue covering every fitness setup requirement, from individual pieces of equipment to the complete design of a gym, with the Gym Design service offering bespoke 3D renderings.

Domande frequenti - Gym ball

  • The rule of thumb is to sit on the ball with your feet flat on the floor and check that your knees form an angle of about 90°. As a general guide: 55 cm for those up to 165 cm tall, 65 cm for those between 165 and 180 cm, and 75 cm for those over 180 cm. For specific exercises such as the ball rollout or the bridge, the diameter may vary depending on the length of the limbs.
  • Yes, but it is important to distinguish between a standard gym ball and an Active Sitting Ball. The latter is specifically designed for prolonged sitting: its dimensions are tailored for use at a desk and, in some models, it features a base that ensures greater stability when stationary, whilst still allowing for the micro-movements of the body – which is the main aim of this solution.
  • This means that the material is designed to lose pressure gradually in the event of a puncture or excessive load, rather than bursting suddenly. This is a particularly important safety feature in professional settings with multiple users and in activities where the body is supported by the ball at a considerable height above the ground.
  • The most common uses include the ball rollout (which replaces and surpasses many plank variations in terms of activating the rectus abdominis), the hip bridge with feet on the ball, the pike, dynamic hyperextension and lumbar-pelvic stabilisation exercises. In rehabilitation settings, passive spinal mobilisation movements are also used whilst lying on one’s back on the ball.
  • The gym ball should be inflated using a suitable pump — preferably a dual-action pump so that the pressure can also be reduced. The correct pressure is determined by feel: the ball should give slightly under body weight but should not become noticeably misshapen. In professional settings where the ball is used daily, it is advisable to check the pressure every 2–4 weeks, as PVC materials slowly lose air over time.
  • It depends on the type of business. A personal training studio with 2–3 simultaneous training stations typically needs at least 3–5 balls in different diameters (55, 65, 75 cm) to cater for clients of all heights. A training room for 15–20 people requires a consistent selection of ball diameters. A ball display stand allows the entire range to be stored neatly and accessibly without taking up floor space.
  • Sidea offers a range of instalment payment options to make it easier to purchase professional equipment. Please see the dedicated page: Payment options Sidea.
  • If you work in the fitness or sports sector, register on the website as a Professional or as an ASD to gain access to the price list reserved for industry professionals. Pro registration allows you to view exclusive discounts and special terms across the entire Sidea catalogue.
  • Yes, Sidea is an authorised supplier on the MEPA (Public Administration Electronic Marketplace). Public bodies, schools, universities, local authorities and public sports facilities can purchase Sidea equipment via the platform Public Sector Online Procurement. For information on product codes and direct MEPA orders, please contact Sidea customer service.
  • Sidea guarantees the right to cancel within 14 days of delivery for all online purchases, in accordance with current legislation. Products must be returned undamaged and in their original packaging. For full details on returns, refunds and the warranty, please see the page Terms and Conditions of Sale.
  • Sidea has been designing and distributing professional fitness equipment since 1999: over 25 years’ experience serving gyms, sports coaches, CrossFit boxes, personal training studios and enthusiasts of advanced home fitness. Official distributor StrongFirst e Luxiaojun, which is exhibiting at the FIBO international trade fair and is the technical sponsor of the Summit of Strength. Every product is designed with durability, functionality and suitability for real-world operational contexts in mind. The service Gym Design Offers bespoke design services with 3D renderings. A warehouse covering over 4,000 m² in Gambettola (FC) to ensure rapid order fulfilment, direct technical advice and a special price list for professionals and amateur sports clubs.