The kBox can solve your problem as a rehab clinician offering safe, controlled and effective training for all of your patients.

The clinician working with rehabilitation must have a comprehensive tool box to serve patients with a wide range of physical conditions, pain and performance levels, mobility and so on. Thus, flywheel training on the Exxentric kBox fits in perfectly.

Practical advantages

The kBox offers everything from low force, low speed training up to high forces, power training and the possibility of everything from pure concentric contractions to eccentric overload. All this provided in a safe and ergonomic way without sound and with no risk of collision. With a small, mobile device like the kBox it also fits easily into the smaller clinic or even the patient’s home if necessary.

Using a computerised feedback system such as the kMeter, you can monitor your patient’s effort and power output if you want to limit them or follow their progression over time. This can also be a great motivational tool for your patient.

Physiological advantages

The kBox uses flywheel technology which offers variable resistance, less need to shift weights and force output is determined by the patients, which gives an effective workout that is also safe and has a lower risk of injury. The variable resistance also gives a variable lever offering a smooth resistance all through the exercise which strengthens the muscle over the whole range of motion (ROM). ROM is also easily adjusted if you want to limit the depth in the squat. For example, you can prevent your patient going beyond certain angles (Watch video).

The harness is automatically distributing the pressure from the load over both shoulders and also reduces torque on the lower back if the patient’s technique isn’t perfect. From the first day in the clinic you can start doing squats and other functional lower limb exercises even if the patient is totally new to the type of lift.

Eccentric load is widely accepted to be the most effective way to treat tendinosis and it has never been simpler than on the kBox. Using different types of methods you can get a significant eccentric load in all possible exercises.

As with flywheel training in general, rehab training with flywheel devices has a solid foundation in scientific support. Important examples include studies eccentric training in tendinopathy (Murtaugh & Ihm 2013), eccentric training for elderly (Gault & Willems 2013) and flywheel training with elderly (Onambele 2008).


Some examples of applications of the kBox in rehab settings include:

  • post-operative rehabilitation after anterior cruciate ligament (ACL) reconstruction (read more),
  • rehabilitation of tendinopathies,
  • prevention of recurrent injuries,
  • treatment of patellofemoral knee pain syndrome, and
  • adapted training during periods of injury.

Flywheel training on the Exxentric kBox is already being utilised by rehab clinics in the Netherlands, Sweden and the UK, with several other countries under way. Also, the kBox is in use for rehab in performance sports, including European elite teams in football and cycling, and also emergency services.


With its variable resistance, the kBox is highly suitable for strength training for seniors and older adults, for rehabilitation as well as general health and fitness. [Read more]

Further reading


Go back to Applications or proceed to flywheel training equipment.

Proceed to learn about the kBox flywheel training device.



kBox4 Active

The Newest model, the kBox4 Active is built on proven, reliable technology. The perfect tool in strength and rehabilitation at our lowest price point.

  • Newest Model
  • Holds 1-2 Flywheels
  • kMeter Compatible
  • Weighs 15 kg
  • Starting at €1 410 / $1 585
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kBox4 Lite

Often chosen for its smaller foot-print, the kBox4 Lite model is of a lower weight, portability and not to mention its competitive entry cost level.

  • Portability
  • Holds 1-4 Flywheels
  • Built in kMeter
  • Weighs 9.5 kg
  • Starting at €2 300 / $2 575
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kBox4 Pro

The kBox4 Pro is our premium model with the greatest versatility. It’s ideal for sports teams and larger training and physiotherapy facilities.

  • Largest Floor Space
  • Holds 1-4 Flywheels
  • Built in kMeter
  • Weighs 15.5 kg
  • Starting at €2 990 / $3 345
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The kPulley is the ideal horizontal solution for improving strength by offering flywheel training for rotational and pull exercises.

  • Horizontal Model
  • Holds 1-2 Flywheels
  • Built in kMeter
  • Easy to assemble
  • Starting at €1 750 / $1 955
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