Applications: Performance Sports

Flywheel technology is getting more and more momentum in sports performance as athletes and coaches see the benefits of the Exxentric kBox. Scientists are gathering increasing evidence to support this method of training. The advantages of flywheel training in performance sports include physiological, practical, ergonomical and economical benefits.


Sport examples

The advantages of the kBox for improving strength and conditioning are valid in a wide range of performance sports. The following sports are examples where there are already broad evidence of improvements and reference clients are established:

Baseball – The popularity of the kBox among coaches who strive to develop baseball players’ strength is growing. The equipment is already used by several Major League Baseball teams. Read more.

basketballBasketball – The kBox targets many important aspects of developing basketball athletes’ strength and is already used by several teams of the US National Basketball Association. Read more.

applications- cyclingCycling – Flywheel training is gaining momentum also among endurance athletes as they realise the benefits of strength training supported by scientific research. Examples includes an International Cycling Union pro team which has been training extensively on the kBox in Belgium. Read more.

Endurance Sports – Strength training has proven benefits for endurance sports athletes, for which the kBox offers a highly versatile and portable solution for efficient and evidence based training. Read more.

Football (American) – The kBox has many features for building strength, mass and power, which is critical in football, with teams such as the Oakland Raiders and the Philadelphia Eagles of the NFL incorporating the kBox into their training already. Read more.

FootballFootball (soccer) – In association football, flywheel training is used by head strength & conditioning coaches of many elite teams in their regular training protocols. Clients include top teams in the premier professional football leagues of France, Italy, Portugal, Russia, Spain, Sweden and the UK, as well as top international academic institutions developing football talents. Read more.

Golf – Many important aspects of developing golf players’ strength are targeted by the kBox, and it is already applied by several prominent golf trainers and their clients in Europe and the US.  Read more.

gymnastics2Gymnastics – The kBox targets many important aspects of developing gymnast athletes’ strength and is already used by several troupes in different countries. From high-end gymnasts we see more examples of sport-specific drills aimed at improving maximal power development. Read more.

HandballHandball – Functional leg training for handball athletes are lateral squats and lunges. This can be performed with the kBox unaffected by casts or upper limb injuries because of the harness. The kBox is used with great success by elite handball athletes both in pre-season training and during season for upper limb injury rehab. Read more.

Ice HockeyIce hockey – In professional ice hockey, flywheel training is used by strength & conditioning coaches and players of many elite teams in their regular training protocols. kBox users in ice hockey already include coaches and players in Sweden and Switzerland as well as the National Hockey League in the US. Read more.

Nacka DojoMartial Arts – martial artists needs to develop a wide range of physical capacities and often have a very high training volume in the elite and pro leagues. The kBox offers a diverse number of drills to improve overall strength and increase muscle mass, but also more specific drills for core and rotational drills. Read more.

skiingSkiing – The eccentric training possibilities on the kBox highly correlates with the physiological requirements of competitive downhill skiing as well as the possibility for Post-Activation Potentiation on a portable machine. The kBox is used in pre-season training by national alpine teams as well as freestyle skiers. Read more.

SwimmingSwimming – Studies have shown that by using a Post-Activation Potentiation regimen (PAP) before a race, swimmers can start up to 35% faster, and the kBox is already in use by Olympic level swimmers on several continents. Read more.

Tennis – The kBox targets many important aspects of developing the Tennis players’ strength and is already adopted by high level players. With flywheel training on the kBox tennis players have a tool for improving sprint speed, change of direction ability and hitting power. Read more.

Track & FieldTrack & field – The Exxentric kBox is used by elite sprint coaches with impressive results since it can be used for a multitude of exercises for leg and hipextension and the posterior chain, both heavy and explosive. The kBox could also be used for eccentric training and overload, which is known to be highly preventive on hamstring strains. All together, it is a competent tool in the track & field coach toolbox. Read more.


Physiological advantages

The physiological aspects of flywheel training using the kBox are that it offers a variable resistance that automatically gives maximal resistance all through the exercise and increased mass and strength in every angle. With the possibility of a high eccentric load or overload the effects on these parameters and performance greatly outperform traditional weights. Eccentric overload is much more effective to increase strength, speed and mass, especially in trained subjects.

At the same time eccentric training is very injury preventive. Many injuries occur during eccentric contraction, like hamstring strains, so by incorporating this in pre-season or rehabilitation will greatly reduce the risk of new or recurrent injuries.

Eccentric overload is also shown to increase type IIx MHC and volume of the IIX fibre, which means transformation of the muscle into a faster phenotype. With a digital feedback system you can monitor your athletes’ performance and progression down to every repetition.

Practical advantages

A practical advantage is that with the variable resistance your athletes don’t have to change weights between sets, users and even exercises. Shorter or taller athletes can easily workout together without having to change the height of the rack. This makes sessions more efficient and saves time for other important aspects of the athletes’ training, like resting, eating, tactics or play.

Using a harness for lower limb exercises the athletes can work at their highest performance and not be limited by any injuries in hands or arms or by inadequate technique. The harness unloads the upper back from point pressure and the lower back from torque which allows the athletes to focus on their performance instead.

Another practical advantage with the kBox is its mobility. Only weighing about 23 kg (50 lbs) with accessories, you can bring it into the field, into the locker room or on your trip or camp just like you bring your water bottles. Start combining heavy lifting or power training with your sprints, jumps or game play in a completely new way.

Ergonomical advantages

The ergonomical aspects are that there is no metal-to-metal sound, no risk of collision or dropping weights on the floor. This also results in less need for space and sound-reducing materials to work out, and you and your athletes can focus on the performance.

Economical advantages

With the above advantages, the economical advantage becomes obvious. With a single device offering over 30 exercises, mobility, safety and efficacy with the same or lower price than a complete barbell set you really get your moneys’ worth, and you hardly even need any extra space.


To discuss the potential applications of flywheel training in your sport, please feel free to contact us at any time.



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“Excited with the gains I’ve made this summer incorporating the kBox into my workouts!”
– R.J. Umberger (US), professional hockey player, Philadelphia Flyers



“Never had such a quick positive result on any other equipment. I’m actually doing less and getting more.”
– Edward Ginzburg (Australia), Athletic Development Coach



“The fastest drug-free changes I have seen on paper”
– Carl Valle (US), Olympic Track & Field Coach (article)



“What you don’t use. Your competitors will.”
– Sam Leslie (Australia), High Performance Sports Physiotherapist



“I can’t imagine working with professional football players without a kBox in my fitness room.”
– Didier Bouillot (France), Football Fitness Coach, SC Bastia



“The players that have used it thus far have loved it.”
– Andrew Hauser (US), Medical Coordinator, Arizona Diamondbacks



“The best piece of equipment that I have come across”
– Chris Korfist (US), Sprint Coach guru (article)



“The kBox has contributed to the development and improvement of gains in strength and power of the players very successfully in the last two years.”
– Paulino Granero Gil (Russia), Physical Football Coach, CSKA Moscow



“All in all a very versatile piece of equipment which I found to be a nice addition to a coach’s toolbox.”
– Paul Pook (Australia), former Head Performance Coach, Russia Ski and Snowboard Federation, Irish Rugby Football Union



Contact us for a discussion about the applications of flywheel training in your field. 📧