Greater force GrEater Gains
Join over 400,000 people who have switched from weights to X3.
X3 Fatigues Muscle Faster Than Weights
Weights overload joints and underload muscles, limiting muscle growth. Now, there’s a better way.
With variable resistance training and X3, you mirror your body’s natural strength curve: higher forces in your strong range and lighter forces in the weak range.
Variable resistance is the most effective way to build muscle, and X3 is the most powerful and effective variable resistance training system created.
About the inventor
John Jaquish, PhD, is a Wall Street Journal best-selling author of Weightlifting Is a Waste of Time. He is the inventor of OsteoStrong, a bone-density-building medical device that has reversed osteoporosis for thousands and created more powerful, fracture-resistant athletes across 300 clinics worldwide.
While researching bone density, Dr. John Jaquish discovered a sevenfold difference between the weakest and strongest ranges in weight lifting. The discovery led to the invention of X3, the ultimate muscle-building system.
Dr. Jaquish’s latest invention, X3 Force, adds real-time force tracking and data-driven workouts to X3’s proven variable resistance training methodology. Dr. Jaquish is also a research professor and a nominee for the National Medal of Science.
Dr. Jaquish also invented osteogenic loading equipment used at more than 200 OsteoStrong centres located in 14 Countries globally to improve bone density.
Dr. John Jaquish’s 365-Day Transformation
Like many others, Dr. Jaquish spent hours in the gym every week to look moderately fit.
Eventually, he developed a better way of working out after years of injuries and frustration.
In two years, he put on over 45 pounds of muscle simply by training with the X3 system, supplementing his protein intake with Fortagen, and streamlining his diet.
Akbar Gbaja-Biamila
Alex Anzalone
Andre Drummond
Cedric McMillan
Shawn Baker, MD
Dan Cristian
Forrest Griffin
Gadiel Micu
Jamal Hill
Terrell Owens
Adam Von Rothfelder
Javon Leake
Trusted by the World’s Best Athletes
Weight lifting causes joint damage and limits strength-building potential. For many elite professional athletes and championship teams, the injury risk is too high—and the returns are too low.
More and more athletes are turning to X3 to build muscle and increase strength. It’s the workout system of choice for football great Terrell Owens, MMA legend Forrest Griffin, and the NBA’s Miami Heat.
THe human Upgrade podcast
John Jaquish explains why variable resistance training is the most effective way to build muscle and burn fat. Tune in and discover the facts behind variable resistance training, the world’s most powerful variable training machine, and why lifting weights is a waste of your time.
An All-in-one HOme Gym
X3 Bar – This Olympic-style bar, made of machined anodized aluminum, has internal bearings to optimize grip, a solid steel center shaft, and stainless steel hooks, allowing you to lift over 600 pounds of force.
Upgrade your X3 Elite to X3 Force to measure your real-time force under variable tension and repetitions, offering a precise view of your exercise performance.
Custom Engineered Resistance Bands – Includes heavy-duty resistance bands made with 15 latex layers, which can provide over 600 pounds of resistance. Heavy Duty Steel Ground Plate – Protects your ankles from high forces produced by X3.
Exclusive Access to the X3 12-Week Program – With detailed videos covering all aspects of the X3 12-Week Program, you can master each exercise movement to get the most from variable resistance training.
Chest Press
Tricep Press
Overhead Press
Front Squat
Deadlifth
X3 12-Week
Workout Program
The X3 12-week workout and nutrition programs are only available for X3 customers. Start this push-pull split routine to build muscle, increase strength, and transform your body. Follow the X3 Program and discover how strong you can be in just 10 minutes a day.
- Guidance on exercise form and technique
- Simple methods for accelerated strength training
- Tips on when to exercise and when to rest
- Nutritious meals with little to no prep
- Help from tens of thousands of X3 users in the X3 Facebook communities
The Ultimate Solution for Maximizing Muscle and Minimizing Body Fat
*With optional X3 configurations: 600+ pounds with X3 Elite Band. X3 Force is required for real-time force tracking and data-driven workout functionality.
X3 Bar Results:
Before and After
Caleb Demmons
“I started at about 190 pounds in March. Today I weighed in at 173. Being light but strong is exactly what I need and x3 has helped me skyrocket my results and training. As a professional parkour athlete, regular weightlifting always left me too sore. With X3, I can lift as heavy as possible and jump right into training afterward. I’m never sore and I perform better. X3 is the perfect supplement to my training.”
Mabel Fornos
“I lost 30 pounds of fat in 4 months and gained muscle. My body has transformed. X3 is Amazing! THANK YOU!”
Rich Ouano
“I’ve been using X3 for just over four years. I haven’t stepped inside of a gym since then. I will NEVER ever go back to free weights again. My life, as well as my physique, have completely transformed. I barely recognize myself in the mirror, and the gains continue, week after week. Thanks so much to Dr. Jaquish for this amazing, life-altering, and life-changing invention!”
Grant Denham
“Beyond grateful for you (Dr. J) educating the world on variable resistance and the creation of the X3! It’s all I used in my fitness transformation for exercise. I also use fortagen twice daily and eat carnivore. I’ve read your book twice and watched every podcast you’ve done on YouTube. I would always injure myself in the gym and never had consistency. Weightlifting sucks compared to X3!”
Aaron Legassie
“I stopped training for over 10 years. I just lost the desire to weight train because of the lengthy sessions with minimal results. I’ve been utilizing X3 for 8 months now. It has changed my life. I’ve lost 117 POUNDS! The program, as-is, is absolutely amazing. I have gained an incredible amount of mass and can see definition in my abs for the first time.”
Dan Quigley
“The X3 Bar has completely transformed my fitness journey, enabling me to achieve incredible results with minimal time commitment. Within a short span, I went from 197 lbs to 180 lbs, while simultaneously reducing my body fat from 22% to around 10%, thanks to its efficient 15-20 minute workouts. Not only has it helped me achieve a more defined physique, but it has also helped significantly improve my performance in obstacle course races, enhancing my strength, grip, and endurance.”
Alex Naymark
“Since I started X3 about 17 months ago, I’ve completely transformed my body by losing 35 lbs of fat and putting on 12 lbs of lean muscle. I’m still getting leaner while increasing muscle mass. This has been a life-saving workout regimen coming from an injury ridden powerlifting world. X3 is the best workout ever designed for putting on muscle. Thank you, X3 team!”
Stephen Heston
“I started X3 at 185 lb and between 12-15% body fat. I am currently at 190 lb and between 7-9% body fat. What I found remarkable about the X3 is that I was able to add pounds of muscle mass while my body fat % saw a steady decrease. All while training MMA full time. When I was hitting the gym to lift weights, I never saw results like that. I use X3 right before I work a heavy bag, and it’s made a BIG difference in strength and performance.”
X3 Bar
Build muscle faster with the X3 Bar Elite home gym. X3 uses variable resistance to drive tremendous strength gains without damaging joints.
- Greater strength and muscle gains in just 10 minutes a day
- Complete home gym system with over 600 pounds of available force
- Easy to follow X3 12-Week Program, proven to help you grow muscle faster than free weights
Frequently Asked Questions
Why is X3 more effective than free weights like dumbbells or barbells?
Free weights give you a constant resistance. For example, if you do a bicep curl with 25 pound dumbbells, the resistance is 25 pounds when you start the exercise and 25 pounds when you finish the exercise. It is constant. It does not vary. X3 uses variable resistance training, which effectively lowers the resistance during the lifter’s weakest range of the lift and increases it during the stronger portion. As a result, you put less stress on your joints where you are weaker and more stress at points in the range of motion where you are strongest. With X3’s variable resistance exercises you maximize the force applied to the muscle, which builds greater muscular activity.
What’s the difference between the X3’s heavy resistance bands and other resistance bands?
Most resistance bands cannot handle a heavy amount of force. 99% of bands, even resistance bands for pull-up bars, are made from a petroleum-based material. This weak material will snap with enough force. X3’s heavy-duty resistance bands are made of layered latex, which is extremely powerful and far more powerful than most bands. X3’s bands can handle over 600 pounds of force when used safely with the X3 bar and resistance band ground plate.
Why do I need the X3 resistance band bar, not just the resistance bands?
X3’s heavy resistance bands can produce forces exceeding 600 pounds. Using heavy resistance bands without a heavy-duty resistance band bar like the X3 bar can injure your wrists and ankles. You won’t be able to fully perform the movement with the proper range of motion as your joints cannot handle these forces without protection. That’s why X3 has a specially machined steel resistance band bar with internal bearings, like an Olympic bar, so your grip is continuously optimized to support heavy loads. Standard resistance bands with handles can’t handle the necessary forces required for muscle growth and often don’t provide adequate wrist protection.
What does the X3 ground plate do?
The X3 heavy-duty steel ground plate creates an anchor point for the resistance bands during heavy-load exercises such as front squats or deadlifts. The X3 ground plate gives you a wide base to loop the resistance bands under so the forces are spread out equally against your feet, protecting your ankles from the heavy forces. Made from solid steel, it provides a strong resistance band platform for full-body exercises.
What types of exercises can I do with X3?
X3 Bar is a full-body variable resistance training system. With X3, you will get the included X3 12-week workout plan, which provides careful instruction on proper form and an efficient workout routine that’s easy to work into your daily routine. The X3 12-week program consists of the most effective strength training exercises, such as squats, chest presses, bicep curls, and deadlifts.
How many sets do I need to do with the X3?
By maximizing the force applied to the muscle at all the ranges you, X3 takes your muscles to a deeper level of fatigue. Therefore, one set is all you need per exercise.
How many repetitions should I do per set with the X3?
The recommended rep range is 15–40 full repetitions. For example, when you get started, you may only be able to do 15 complete repetitions of the chest press with a particular band, but you will need to keep working with that band for that same exercise until you have worked up to do 40 full reps. At that point, you will need to move up to the next band. If you cannot yet do 15 full reps with a band on a specific exercise movement, you will want to move down to a lighter band and work towards 40 with it first. The partial reps are essential but don’t count towards the 15–40 reps.
