Hip Extension

An exercise with a wide use in both performance and fitness.

The unilateral hip extension on the kBox gives your glutes a day they will remember. More and more people have discovered this drill.



Stand on the kBox using an Ankle Cuff, with or without support by holding on to a rack or bar. Another variation is to lean forward where the kBox can be in a tilted position.


Effective targeting of the glutes in a controlled way. It is very beneficial in an eccentric overload program for sprint development (ref). Use delayed eccentric action targeting the horizontal phase in sprinting or assisted concentric for further eccentric overload.


Targeting glutes in a fitness program or horizontal force production and performance in sprinting.

Go back to exercises, or read more about the applications of flywheel training.


References from Twitter



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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