facebook pixel

Free Delivery on orders over £999, UK main land only - Buy Now, Pay Later with Klarna


kBox4 Active System

The latest model in the kBox range, the kBox4 Active is a robust entry-level device in the product line, providing the essential benefits of flywheel training at an attractive price level.

The kBox4 Active is built with a steel chassis and can hold up to two flywheels, ideal for serious home users, group class training and amateur sports.

A list of accessories included with each kBox is shown in the description tab below.




The Kinetic Box, kBox4, is built on proven and reliable technology and a perfect tool in strength and rehabilitation for upper, lower body and core. kBox4 is used in gym, small group PT, traditional PT, by athletes in high performance sports and in clinics with patients. Flywheel training also offers safe and easy eccentric overload offering the user higher gains in muscle mass and strength.

The kBox4 Active Starter System includes:

  • kBox4 Active Platform
  • Flywheel 0.050kgm2
  • Hip belt
  • kGrips

The kBox4 Active Advanced System includes:

  • kBox4 Active Platform
  • Flywheel 0.025 kgm²
  • Flywheel 0.050 kgm²
  • Hip Belt
  • Harness
  • kBar
  • kGrips

The kBox4 Active Advanced Plus System includes:

  • kBox4 Active Platform
  • Flywheel 0.010 kgm²
  • Flywheel 0.025 kgm²
  • Flywheel 0.050 kgm² (2 pieces)
  • Hip Belt
  • Harness
  • kBar
  • kGrips
  • Foot Block
  • Ankle Cuffs
  • Elevation Blocks
  • Extension Strap
  • Cover Mat

A full range of attachments, harnesses and flywheels are available to customise it to your requirements.

The kBox4 Active can be equipped with up to two flywheels in three different sizes, made from laser cut and powder coated carbon steel.

  • Heavy: 0.050 kgm²
  • Medium: 0.025 kgm²
  • Light: 0.010 kgm²

There is no upper limit in how much kinetic energy you can produce, in the flywheel motion. This means that you can always use a higher force and accelerate the flywheel more. Resistance is variable in that if you pull less the flywheel will resist less. Therefore, the kBox4 is suitable for both resistance training and rehabilitation.

With FWEDs, every repetition is maximal, with both a higher force early in the set and lower in the end, making the exercise much more efficient. This is why flywheel training gives a hypertrophic response earlier in the training regimen than traditional weights.

You can also attach any handle or grip and do many upper body pulling and pushing exercises for arms, shoulders, upper and lower back.

Technical Specifications

Weight 15 kg
Dimensions 68 × 43 × 21 cm
kBox4 Active Options:

kBox4 Active Starter, kBox4 Active Advanced, kBox4 Active Advanced Plus

Click on the title of the research below to read the article.

Flywheel resistance training calls for greater eccentric muscle activation than weight training


There are no reviews yet.

Be the first to review “kBox4 Active System”

You might also like