1. Worldwide delivery
  2. 100% satisfaction guarantee
  3. 12 month warranty
  4. Secure payments
  • English

Increase your strength training effectiveness

About kBox

Whether your goal is to get an edge on your athletic performance, prevent or rehabilitate an injury or improve your general health and fitness, flywheel training with the kBox gives you a number of advantages.


Join the Movement

What Makes Flywheel Training Unique


Increases your strength training effectiveness

It increases the effectiveness by applying the inertia of a flywheel instead of simple gravity to create optimal resistance.


Improves performance & rehabilitation

It improves the efficiency of training programs while lowering the total costs as compared to alternatives.

Read More

Join the movement

Strength & Health Benefits


Standard and advanced training methods

The kBox gives you opportunities to perform effective standard exercises as well as advanced methods for eccentric, concentric and isometric training.


Advantages over traditional training

The resistance is variable and unlimited. Eccentric overload can easily be achieved as well as mobility, ergonomic and economy.

Read More


Announcing New and Redesigned kBox Features

Exxentric’s Head of R&D, Fredrik Correa announces new and redesigned kBox4 features for optimizing your training.

Read more


Assessing Your Eccentric Overload

Since the launch of the kMeter we have received a lot of positive feedback. It's very satisfactory that so many of you see the benefit of direct feedback in your training and that you want to go beyond counting sets and reps.

Read more

User stories

Fredrik Correa Interviewed on the Historic Performance Podcast

Exxentric co-founder Dr Fredrik Correa is interviewed by coach James Darley on an episode of Historic Performance Podcast.

Read more


New High-End Systems and Free Global Shipping

Launching our most complete kBox configurations so far, and celebrating this by offering free global shipping on any system.

Read more

Our product family

Designed for Multiple Applications

The Exxentric kBox is being used by athletes and therapists for a wide range of flywheel training applications. From its initial break-through in performance sports to recent years, personal trainers have discovered what flywheel training and a kBox investment can do for businesses in Health & Fitness.


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
Read more

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
  • Bulit in kMeter
  • Weighs 9.5 kg
Read more

kBox4 Active

The Newest model, the kBox4 Active is built on proven, reliable technology.

  • Newest Model
  • Holds 1-2 Flywheels
  • kMeter Compatible
  • Weighs 14.5 kg
Read More


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
  • Bulit in kMeter
  • Easy to assemble
Read More

Try before you buy

Find a kBox Facility Near You

Your satisfaction as a kBox customer is our highest priority. Why not try out the kBox before you invest in the equipment, click here to discover all the resellers in your area!

Read more

About us

Exxentric was born out of a real need

Exxentric AB is a company developing innovative, science-based training equipment and methods for strength and conditioning, including the kBox, used by performance coaches, personal trainers and physiotherapists worldwide since 2011.

Read More