In handball, flywheel training with the kBox is rapidly gaining momentum for performance, prevention and rehabilitation of athletes.

In handball, there are many good reasons to use kBox for strength and conditioning. Developing sprint speed, jumping ability, injury prevention being the main ones.

Sprint Speed

Sprint speed in short sprints is highly correlated to squat strength, but like most other athletes outside of weightlifting, handball players are not very schooled in Olympic lifts or powerlifting. The kBox allows these athletes to perform squats both with high loads and high power in a safe way to increase strength and performance without risking injury.


Studies involving similar sports with a lot of jumping (volley- and basketball) have also shown that a low volume of in-season training with flywheel squats significantly increases jumping ability without increasing the risk of tendinopathy (Gúal et al 2015).

Injury Prevention and Rehab

Handball specific prevention can be the strengthening of the back of the shoulder and upper back, and prevention of the very frequent shoulder disabilities. Drills can be different row variations with and without eccentric overload and external rotations.

During periods of injury to the upper limbs or hands, the athlete can continue heavy resistance exercises such as squats and lateral squats thanks to the Harness or Squat Hip Belt.

It is quite common that you have to work around your athletes’ problems, bad knees, sore back and so on. Eccentric squats are used by many players with knee problems and waist loaded squats for those with back problems.


The benefits of flywheel training in handball, as compared to traditional training with gravity-based equipment, include:

  • Easy to train in a group with individual differences in strength and height.
  • Effective sessions due to the short time in shifts between users.
  • Safe training, less technique dependant.
  • Mobility, possible to train in the field combined with play or sprints or to bring on tours and games away to work with the resting or injured players.
  • Wide range of training modes: heavy or explosive, uni- or bilateral.
  • Train despite upper limb or shoulder injuries using the harness or belt.
  • More effective in building functional strength and increase performance than weight stacked machines and traditional free weights.


Users of kBox in handball include elite teams in Croatia, Finland, Spain and Sweden.


Go back to applications for sports performance or contact us.


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
Shop System

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
Shop System

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
Shop System


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
Shop System