Working To Keep Our Clients Safe

COVID-19 Update

Safety is always our top priority. See how we’re ensuring client safety in every training session.


At Evolution Fitness, we always believe in maintaining an environment that is safe, clean, and comfortable. We will continue to ensure that every surface is sparkling clean before, during, and after every training session. 

Thorough Sanitation Between Clients

As a small, individual focused gym, we can ensure that EVERY surface in the facility has been sanitized. Each nook & cranny of our exercise equipment will be thoroughly sanitized before you arrive.

1 On 1 Interaction

In addition to receiving top notch targeted training, because all of our sessions are 1 on 1 based, interaction and contact with other individuals is completely eliminated! Your session will be limited to only you and your mask wearing trainer! 


1 on 1 Training

with NATHAN Cook

Experience the difference 15 MIN + 1-2X PER WEEK can make.
Our ARX systems are the safest, most effective and efficient form of resistance training to-date.

We all know that exercise is important for our health, but it can be hard to find the time.
The gym can take a lot of time and energy. Most people don’t have an hour to spend in the gym each day, especially if you’re just starting out or coming back after a long break from working out. I’m here to help! At Evolution Fitness, I design individualized programs so that anyone who wants to improve their health can do it with as little as 15 minutes, 2x/week. Your one-on-one personal training at Evolution Fitness is a private session with you and me, Nathan Cook. As 1 of 8 Central Oregon Personal Trainers that are Certified Exercise Physiologists I can help you get the most out of your High Intensity Training (HIT) sessions! You will see results in your body and mind even faster than if you were spending hours at the gym every day!

Why Choose 1-on-1 Personal Training at Evolution Fitness?

Private Personal Training
It is easy to be self-conscious when starting something new, with one-on-one personal training you can train in privacy. I will teach you the proper form, correct technique and will make each session fun and enjoyable.

Each session will be tailored to your specific goals, whether it is weight loss, to get fit, recovering from an injury or training for that special event. With one-on-one personal training you will get my full attention and support in establishing or modifying your fitness program, keeping you motivated and providing nutritional guidance.

For people with busy work schedules, stay-at-home moms or those who need to train before or after work, high intensity training achieves results in a short amount of time, so you can fit exercise into your busy schedule. I will help you find an exercise program that fits your goals and lifestyle.

“ARX is a computer-controlled, motorized exercise technology that provides you with a more effective, efficient, and quantified workout compared to traditional exercise tools.”  ~Nathan Cook, Personal Trainer

Here’s how it works: when we exercise, our strength capability is constantly changing, but if you are using tools other than ARX, these tools do not account for these changes, forcing you use a single weight. This is why you need to always change weights to adapt to our ever-changing bodies.  Over-time, this is extremely inefficient and is a guessing game that cannot be won. You will never be able to choose the perfect resistance, 100% of the time.

This is where ARX fits in…

With ARX, the technology instantly and automatically adjusts to your changing level of strength so it’s the perfect amount of resistance, all the time, making your workouts as efficient and effective as possible.

This means you can achieve more of the benefits of exercise, and do so in just minutes per week.

On top of that, ARX can quantify your progress using its real-time feedback system that tracks your performance, instantly and automatically, as you exercise. No more apps or pen and paper.

The ARX software tracks your maximum force production, accumulated force output, and many other useful data points so you can tell if you are progressing and by exactly how much. All of this is data is then stored in your profile so every workout can be precisely repeated on any ARX machine.

With ARX, it’s never been easier or safer to exercise like the pros while doing so in just a fraction of the time!




The most effective, efficient and safest workout possible


Increased strength, muscle mass and bone density


Improved flexibility, endurance and insulin sensitivity


Obvious results in a short period



There are no wasted movements with High Intensity Training (HIT). Because you exercise at a high level of intensity, you gain maximum benefits in short amounts of time! In fact, in just two 15-minute sessions per week, you will experience outstanding results with this approach to strength training. With our ARX (Adaptive Resistance Exercise) Machines, you work all your muscles with both compound movements and simple movements – in a very short amount of time. The proper form and slow speed of movement inherent in HIT means that there is no wasted motion or movement!

Each of our ARX machines gives you a full-body workout. In fact, our two ARX machines are like having an entire fitness studio in one, all-encompassing machine! All of this means you work your muscles much harder in much less time!

Educated Trainer

I offer the relevant credentials and expert knowledge to help you get the most out of your High Intensity Training (HIT) sessions! My education includes a bachelor’s degree in exercise science and health as well as another bachelor’s degree in food and nutrition. What’s more, I am certified as an Exercise Physiologist with the American College of Sports Medicine, the gold standard in the field of exercise science. Here in Central Oregon, I am one of a mere eight that hold this advanced credential.

I not only know all about HIT, I have benefited from it with great results! With me, you get a caring, thorough personal trainer who is extremely knowledgeable about the techniques of this form of strength training and you have someone who is completely committed to your success!

SLOW Movement

When you utilize High Intensity Strength Training (HIT) you will get the best health and fitness results with its trademark slow movements. How does this happen? It’s simple. By moving slowly and with focused movements, keeping a constant tension to a point of momentary muscle fatigue, you will experience a deep level of work like nothing else you’ve ever experienced. Unlike traditional weight lifting, with our ARX machines you have the benefit of matched resistance so each repetition is slow and focused.

With these slow movements, HIT gives you the advantage of being an extremely therapeutic form of exercise. The speed of movement and range of motion are preprogrammed in the computer controlled ARX machines. This means you can never hurt yourself by moving too quickly.

What They’re Saying

Client Testimonials

I’ve been going for a couple of months and already see dramatic results. The super-slow workout has been safe (and beneficial) for my painful back. Injured or not, 15 minutes twice a week for an effective workout is awesome. Nathan has been a super great trainer, showing extra concern, personalizing workouts, and motivating me to give my best. Highly recommended!

Jim Sharp


Nathan has done an outstanding job helping me with multiple issues. I have dealt with lower back pain for years and by going twice a week for 15 minutes and pushing my muscles to the limit, my back pain is virtually gone. I also had ACL surgery four years ago and have not been able to run the same as I did before. With Nathan’s help, my knee feels normal again and I no longer favor it while running and playing. Thank you so much for helping me. I recommend this low impact, high intensity training for everyone.

Larry Breazeal


So here is where my review is based from. I have always been a physical and athletic person. Trained as a paramedic and spent 9 years as a personal trainer specializing in HIT protocols. When I became a trainee in HIT our trainer and facility was leading the way in concept and implication of this protocol. Then my wife and I were invited to be trainers in HIT and the journey began. We have watched the “Evolution” of HIT protocols and enjoyed being a part of that effort. What was missing was tested scientific technology to advance what had been happening in the gym environment. Having left the personal training job four years ago I fell flat on my personal efforts to stay fit. Work was taking all my time but I knew I needed to start again before I totally wasted away. Now the fun part of the story. My wife and I heard a new HIT trainer and business was moving to town, blocks away, with the best technology to date. Of course I was skeptical as I knew we had been using the best equipment possible. I scheduled my introductory session with Nathan not knowing what a computer could do to my body that was any better than I had done before. To my surprise, excitement and joy I learned that the new ARX equipment, under the experience and guidance of my trainer, will surpass my expectations about what HIT can be.  A key component to HIT is constant muscle innervation and at no point….rest. We as humans avoid discomfort even if its subconsciously and find a way to rest during a set. This rest doesn’t allow for you to reach the muscular failure we are after to stimulate adaptation. The bottom line is this, ARX had developed a machine that is incredibly safe and the closest thing to perfection I have seen in HIT. Nathan is a wealth of knowledge and experience and after my first session, knew I was hooked once again on HIT training. My evidence, Pleasantly sore ( in my mind) in all the areas I worked in the few minutes under load. I can, with confidence recommend Evolution Fitness, ARX and Nathan Cook for anyone interested in getting stronger at any age, size or level of fitness. Do your research, or not, and make the appointment for your session. Can’t wait for more. Thanks Nathan!!

Jason Hardy


Join Now

Our monthly membership packages make it easy to budget and schedule your workouts.  Invest in your health at Evolution Fitness.