American Football

American Football and Flywheel Training

The kBox has many features for building strength, mass and power, which is critical in football, with many teams incorporating the kBox into their training already.

With flywheel training on the kBox coaches get a tool to work many aspects of muscular performance.


Being a sprint based and momentum based sport, the applications for the kBox can be wide-ranging. It can be used to add strength and mass to players, both upper and lower body strength. Around the sprinting aspect of the sport, it is useful for both explosive power, eccentric strength and change of direction ability but also for injury prevention when it comes to sprint related injuries.

The usefulness of the kBox during upper body injuries is obvious, allowing for heavy squats or split squats, but it’s also useful in players with knee pain due to the meniscus and patellar tendinitis due to the lower shear forces and high eccentric load. Squat, row or deadlift for strength and mass. Mid-thigh pulls, hip extensions, lateral squats, split squats can all be used for power while straight leg hip extensions and hamstring curls for rehab and injury prevention.

The kBox is also used in rehabilitation of ACL injuries, with popular features including the user-set intensity and easy monitoring functionality via the kMeter.


The Exxentric Harness reduces a lot of the torque and stress on the lower back allowing athletes to focus on training quality and high eccentric loads. Easy and safe to perform and monitor in a team setting. Easy to train during periods of upper body injury or rehab after an injury.


Users of the kBox in American football already include the Kansas City Chiefs, Oakland Raiders, Philadelphia Eagles and the Seattle Seahawks of the NFL, as well as individual NFL athletes and many NCAA college football teams.

Proceed to flywheel training equipment, or go back to applications for sports performance.


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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