Future-Proof Your Body

We train for independence. For confidence. For freedom — at every age, and every pace.

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Client Testimonials

After years of going to the gym, trying various personal trainers, and even physical therapy for sports injuries, I hesitated to try this. I usually don’t write reviews, but this has been such a game-changer for me. The technology of their machines, combined with the knowledge and support from their staff is phenomenal. The physical strength and fitness goals that I have been able to achieve in such a short time are amazing. The benefits have been incredible and have far outweighed anything I have been able to achieve on my own. The targeted eccentric training really does make all the difference in taking your fitness/athletic goals to the next level. A short session gives results equal to hours at the gym. I highly recommend anyone to book a free session and see for yourself!

Ava K.
Entrepreneur

I am recovering from ACL surgery and there is no better place to gain back strength than here. John has been very helpful setting up my exercises to optimize strength gains even while under the restrictions of my knee not being able to do regular free weight training. Thanks to him I am way ahead of the game and I’m recovering faster than ever.

Paul H
March 2024

ALL-IN-15 is the BEST decision I've made for my health and my life. It is the 'YES' you will be forever grateful for! It's hands down the best training to reach your goals.

Riley S.
Athlete

I'm the healthiest I have been in years! Joining ALL-IN-15 has been one of the best health decisions I've ever made to improve my well-being

Alicia D
CEO
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First Session Free

Muscle is the Currency of Health

You need muscle. Muscle keeps you moving, prevents injuries, and increases your metabolism. Our revolutionary training method will help you preserve muscle and build strength.

At ALL-IN-15, you will experience:

Eccentric Training

Work smarter, not harder. Eccentrics are the best way to build strength.

Safety First

Gain strength without worrying about injury.

More Energy

With more muscle comes more energy to do the things you love.

A Faster Metabolism

Muscle burns calories. The more you have, the faster your metabolism.

Longer Vitality

More muscle is linked to a longer, more quality life.

Transformative Data

We don't guess. We know exactly where you need to build strength.

First Session Free

ALL-IN-15 is For You If...

  • You want to feel strong, without spending your life in the gym.
  • You want to carry groceries, kids, or travel — without thinking twice.
  • You want a body that supports your life, not dictates it.

Try it today for free.

Training Technology

Why Once per Week?

Progressive Overload.

On average, in one session, our clients handle 25,000 LBS.

In 30 minutes, you can do what would take hours in a traditional gym. That is the power of our groundbreaking technology.

Eccentric Focus.

Top European sports scientists have proven that eccentric training yields the best strength results. By training in the eccentric, you will tap into strength you didn't know you possessed.

Our Services

Safely Train the Whole Range of Motion

First Session Free
Kineo Intelligent Load

The best results in the least amount of time.

Here’s what makes us different:
  • Time-Saving Workouts: Get the benefits of a week’s worth of training in just 30 minutes.
  • Personal Training: Private sessions focused on future-proofing your body.
  • Safe and Controlled Movements: Reduce the risk of injury with precise, joint-friendly eccentric training.
  • Enhanced Performance: Activate your central nervous system for improved balance, strength, and stability.
No More:
  • Wasting Hours at the Gym
  • Generic Fitness Programs that achieved limited results
  • High-Intensity Workouts That Lead to Injuries

Experience a smarter, safer, and more efficient way to build strength.

Your First Session is On Us

At ALL-IN-15, we’re confident you’ll feel the difference after just one session. That’s why your first 30-minute workout is on us—no pressure, no commitment, just the chance to experience the smarter, faster, safer way to build strength, improve mobility, and feel your best.

Discover how our personalized training, powered by science and technology, can improve your mobility, stability, and quality of life.

First Session Free
Blog

News & Articles

Learn from experts and understand the proper techniques to focus on your calisthenics

All Blogs
Training
The Overlooked Secret to Athletic Success: Eccentric Training for Peak Performance

Discover the untapped potential of eccentric training, the "overlooked secret" to athletic success. Unlike traditional strength training, eccentric exercises focus on the lowering phase of movements, where muscles stretch under load. This innovative approach boosts muscle growth, enhances power, and reduces the risk of injury—all critical for elite athletes striving for peak performance.

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Training
Unlocking Muscle Balance: Your Guide to Strength, Stability, and Peak Performance

At ALL-IN-15, we believe muscle balance is critical for functional strength and injury prevention. Using advanced Kineo Intelligent Load Machines, our Greenwood Village facility provides personalized eccentric training that targets both strength and stability. In just one 15-minute session per week, achieve muscular symmetry, reduce injury risk, and enhance performance. Discover a smarter way to train. Contact us for a free evaluation!

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Health
A Key to Aging Well: Increasing Bone Density

Bone density declines as we age, increasing the risk of fractures and conditions like osteoporosis. Fortunately, with the right approach, bone density can be increased even in older adults. This blog explores how resistance training, particularly eccentric training, helps strengthen bones, improve mobility, and ensure longevity.

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