Reach New Levels of Performance

Adaptive Resistance That Never Caps Out.

Trusted by Coaches and Performance Facilities Worldwide

Built to target the qualities that separate good from great.

Exerfly develops braking, change of direction, power, strength, stretch-shortening cycle efficiency, and eccentric force, all in one system.

Case Study

Real-world results: Bbraking force and mRSI improved in 5 Weeks

A 5-week case study using Exerfly’s motorized flywheel squat protocol showed measurable gains in key explosive performance metrics. By delivering a powerful eccentric overload and enhancing the stretch-shortening cycle, athletes improved their ability to decelerate, absorb force, and explode upward—all crucial for sport-specific movements.

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+39%

Increase in braking force

+19%

Improvement in reactive strength (mRSI)

Swindon Town FC using Exerfly RackFly

Escape the gravity trap of traditional resistance

Traditional weights rely on gravity, creating dead spots where resistance weakens.

Flywheel resistance training eliminates these gravitational dead spots, providing user-defined resistance throughout the entire range of motion.

The 1:1 resistance (concentric:eccentric) ensures continuous force production and maximizes neuromuscular adaptation, driving superior performance outcomes.

Weaponize fast-twitch muscle fibers

Explosive movement starts with fast-twitch fiber recruitment, and Exerfly is engineered to target it.

With resistance that dynamically overloads the eccentric phase, Exerfly stimulates high-threshold motor units that conventional weights often miss, resulting in stronger, faster, and more reactive athletes.

Eccentric overload. On demand.

Our Motorized Flywheel Technology increases eccentric force output to drive superior adaptation.

Add up to 80% greater force in the eccentric phase

Real-time resistance adaptation to athlete output

Allows for both high speed and high force eccentric overload

"The Exerfly experience is second to none. Flywheel training is a unique modality that cannot be replicated with another other modality of training.  For a coach who primarily works with team sport athletes we prize deceleration capabilities as high, if not higher, than speed.  Doing intense deceleration training can lead to soreness, impair recovery, or conflict with a competition schedule. The Exerfly accommodates to our athletes output on a given day and has been quicker to recover from leading to better results, faster, even with a congested calendar."

Ryan Patrick

Peak Fitness & Sports Training

“Having Exerfly at our facility was the best to help our athletes improve their performance, easy to use, amazing customer service and the results are real.”

Jose Catano

Catano Performance

“I think flywheel training with the Exerfly RackFly is a great way to train the trunk and core. It challenges the athlete to a greater degree than when performing the same movements using bands or a cable machine. The uniqueness of the loading helps get more out of even basic exercises like rows and rotational exercises.”

Dr. JP Guidry

Guidry Golf and Sport

“The reason why I like using Exerfly in training is the gains are so much faster than traditional lifting and you get immediate buy-in. It is more engaging and fun for the typical client because they are learning something new, it's not your typical squat, core, or rowing exercise.”

Tim Neuman

Par 5 Performance

“How can I prepare my athletes with high forces without jumping? I found that flywheel, especially Exerfly and its motorized technology was the best way to do that."

Jan Seiler

Strength Training Expert at the Swiss Federal Institute of Sport

“The Exerfly flywheel has been a great addition to our weight room this year. It’s given us the ability to load quicker eccentric contractions, work on reactive strength, and also dose hypertrophy training. We’ve used it both as the main stimulus for certain movement patterns as well as a faster contrast stimulus for certain patterns such as bilateral squats. It gives us options that other equipment in our weight iron is unable to do.”

Jeremiah Welch

LV Aces Performance Coach

Download the Exerfly App

Live feedback on every rep. Prescribe motorized eccentric overload and track a range of performance metrics:

Mean Velocity (m/s)
Peak Velocity (m/s)
Mean Power (W)

Mean Acceleration (m/s²)
Mean Torque (N·m)
Mean Force (N)

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Our Products

Explore our range of Premium Flywheel Training Equipment

Exerfly RackFly

RackFly

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Exerfly 3x3 Rack Model 9ft

3x3 Rack Model

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Exerfly Ultimate

Ultimate

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Train the Way the Game Demands

Free weights load in one direction. Sport moves in every direction. Exerfly adapts in real time to match the unpredictability of performance.

made in the usa

Backed by more than 30 years of manufacturing excellence, Exerfly’s USA-crafted equipment combines precision engineering with superior craftsmanship to deliver unmatched performance, durability, and quality.