Flywheel in Football: Improving Performance and Reducing Injury Risk | FSI Talks #19 ft. Neuroexcellence

What is flywheel training and why it is increasingly used in football

Flywheel (inertial) training has become one of the most interesting tools in modern football strength and conditioning. Unlike traditional methods using free weights or machines, this technology allows athletes to generate variable resistance and greater eccentric exposure, which can improve both performance and injury prevention.

In this article we explore what flywheel training is, why it is particularly useful for football players, and how it can be integrated into training programs without increasing player fatigue.

How flywheel training works

Flywheel training is based on an inertial flywheel system that rotates around an axis. When the athlete performs a movement, for example a squat, the wheel is accelerated during the concentric phase of the exercise.

This acceleration generates kinetic energy, which is then returned to the athlete during the eccentric phase of the movement. In other words, the energy produced when rising from the squat comes back as resistance when the athlete must decelerate the movement.

A key characteristic of this technology is that the load is not fixed, as happens with a barbell or machine. In flywheel training, the load depends on two factors:

• An absolute component, related to the size and inertia of the flywheel.
• A relative component, which depends on the force and acceleration generated by the athlete.

This means that the training is self-regulated and potentially unlimited, since the greater the athlete’s intent and movement speed, the greater the load generated.

The importance of eccentric work in sport

One of the most relevant aspects of flywheel training is the high eccentric demand it produces.

During the eccentric phase, the athlete must decelerate the previously generated energy, which produces high forces at high velocities. Numerous studies have shown that eccentric work produces important neuromuscular adaptations, such as:

• Increased muscle fascicle length
• Greater muscle cross-sectional area
• Improved force production capacity

These adaptations are particularly important in football, where many injuries, especially hamstring injuries, occur during deceleration actions or changes of direction.

Why flywheel training fits well with the demands of football

Football constantly requires players to accelerate, decelerate, change direction and perform repeated sprints. These actions generate very high forces in the hip and leg muscles.

During a maximal sprint, the hamstrings can withstand forces of up to eight or nine times body weight. However, many injuries do not occur during acceleration but rather during braking or deceleration.

This is where flywheel training can provide an important advantage. By returning the energy generated during the concentric phase, it forces the athlete to absorb and control large eccentric forces, improving the muscle’s ability to tolerate these demands.

In addition, flywheel training provides resistance throughout the entire range of motion, something that does not always occur with traditional weight training.

Preparing the athlete without increasing impact

Another important benefit of flywheel training is that it allows athletes to replicate high muscular loading rates without impact.

To prepare a player for the demands of sprinting, jumping or changing direction, plyometric exercises are normally used. However, these exercises generate high ground reaction forces, which increase fatigue and the risk of overload.

Flywheel training makes it possible to generate similar forces in the muscle without the need to jump or leave the ground, reducing joint stress and accumulated fatigue.

This is particularly useful during the competitive season, when players already receive a high volume of physical stimuli through training sessions and matches.

How to integrate flywheel training into practice

One of the most common concerns among coaches is how to introduce this technology without overly complicating training programs.

In reality, flywheel training does not need to completely replace traditional exercises, but can instead be integrated in different ways.

As a complement to traditional weight training

Flywheel exercises can be performed before traditional movements such as barbell squats.

Performing a flywheel set before a squat can act as a neuromuscular potentiator, activating the nervous system and improving motor unit recruitment. This can increase performance in the subsequent barbell sets.

Using training microdoses

Another effective strategy is the use of training microdoses, meaning very short sessions with a high stimulus.

For example, a single intense set of flywheel hamstring curls can generate forces far greater than those achieved with traditional exercises, even with less total volume.

This approach is especially useful during the competitive season, as it allows significant adaptations to be achieved with very little time and minimal accumulated fatigue.

Flywheel training and congested competition schedules

In professional football, teams may play two or three matches per week, which limits the time available for strength training.

In these situations, flywheel training can easily be adapted through short sessions lasting 10–15 minutes.

A common strategy is:

• Day before the match (MD-1): light and fast stimuli to activate the nervous system.
• Days after the match (MD+1 or MD+2): higher inertia stimuli to train eccentric strength.

By using very low volumes, the muscle can be stimulated without interfering with the player’s recovery.

Real-time feedback and training monitoring

Another advantage of flywheel training is the possibility of obtaining immediate feedback thanks to integrated encoders and sensors.

These systems allow the measurement of variables such as:

• Concentric and eccentric velocity
• Force production
• Power output
• Transition time between phases

This opens the door to different prescription methods, similar to velocity-based training, but also to approaches based on power or acceleration.

Thanks to these data, coaches can adjust the size of the flywheel and personalize training for each athlete.

Conclusion

Flywheel training represents an innovative tool that can bring gym work closer to the real demands of football.

Its ability to generate high eccentric forces, variable resistance and intense neuromuscular stimuli makes it a particularly interesting option for improving performance and reducing injury risk.

In addition, its flexibility allows it to be easily integrated into existing training programs through strategies such as complementing traditional weight training or applying microdoses during the season.

In a sport where the ability to accelerate, decelerate and change direction repeatedly is decisive, flywheel training offers an effective way to prepare football players for the real demands of the game.

Thanks to Neuroexcellence for supporting this edition of FSI Talks with their high-performance technology.