ACL Rehabilitation

For improved rehabilitation results and to reduce the risk of re-injury the kBox can help your patients become stronger during the Anterior Cruciate Ligament rehabilitation process.

Flywheel training on the kBox accommodates both rehab patients and clinicians with a plethora of options to cover a wide range of physical conditions and performance levels, including pain, decreased mobility and many others.

Rehabilitation after an ACL injury can be a long and complex process. Despite the lack of published data on this topic, many clinicians and patients are experiencing a benefit already after introducing the flywheel into their rehab. The major goals of ACL rehab is to improve stability, regain strength, maximize function and reduce the risk of re-injury. Many clinicians and patients are using the kBox in later, more dynamic stage of rehab, in order to increase strength and to minimize the risk of re-injury.

Practical advantages

Due to its variable resistance, the kBox offers many different options when it comes to training, whether it be with lower forces and lower speed, higher forces or power training. It also offers the possibility of varying between pure concentric contractions to eccentric overload.

This means the kBox can be utilized by patients when they require higher loads to gain strength, all throughout the rest of the rehab process and even once they have completed rehab. The kBox offers a wide range of both open and closed chain exercises to strengthen the muscles surrounding the knee including squats, lunges and curls.

Training with the kBox is safe and ergonomic, operating in a soundless manner and with no risk of accident. Such a small and mobile device also fits easily into smaller clinics where space is limited or even in the patient’s home if necessary.

The kMeter feedback system is a useful tool to motivate your patients, keeping track of their progress and, when necessary, limit their exertion by tracking their power output and effort levels. They might initially call it a ‘torture device’ but in the end, they are going to thank you for it.

Physiological advantages

The kBox utilises flywheel technology, which as mentioned earlier, creates variable resistance levels. As a result, your patients are able to determine their own force output, making your sessions safer, more efficient and allowing you to avoid shifting any weights between sets and patients.

Using traditional weights, load is applied unevenly throughout the motion. With the kBox, due to the smooth resistance applied throughout the entire movement of any exercises, users can achieve strengthening of the targeted muscle throughout the entire range of motion (ROM). Furthermore, ROM can be easily adjusted to account for any limitations your patients may have. Here is an illustration of this showing how the depth of a squat can be controlled (Watch video).

Due to the structure of our harnesses, there’s no need to worry about the proficiency of your patient’s lifting technique, it distributes pressure depending on a user’s position during each individual repetition. An upright position will distribute load across the shoulders, otherwise, the lever of the force will be shortened reducing torque on the lower back. So even if the patient is completely uninitiated to the intended type of lift, you can immediately start performing squats and other functional lower limb exercises with them on their first day in the clinic.

Eccentric load is widely accepted as one of the most effective methods of building strength and it has never been simpler than on the kBox. Useful in late-stage rehab, by using various methods you can achieve a significant eccentric load in all possible exercises.

Further reading


Go back to Applications or proceed to flywheel training equipment.


kBox4 Active

Our entry level model for the serious personal trainer or demanding home user. The perfect tool in strength and rehabilitation at our lowest price point.

  • Entry Level Model
  • Holds 1-2 Flywheels
  • kMeter Compatible
  • Weighs 15 kg
  • Starting at €1 410 / $1 635
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kBox4 Lite

Offers the lowest weight and best portability which makes it perfect for frequent travel without compromising the training.

  • Enhanced Portability
  • Holds 1-4 Flywheels
  • Built in kMeter
  • Weighs 9.5 kg
  • Starting at €2 300 / $2 665
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kBox4 Pro

Our premium kBox model with the greatest versatility and largest performance area. It’s ideal for sports teams, premium fitness clubs and physiotherapy facilities.

  • Largest Performance Area
  • Holds 1-4 Flywheels
  • Built in kMeter
  • Weighs 15.5 kg
  • Starting at €2 990 / $3 465
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The kPulley2 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 €1 890 / $2 190
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