About Us


Arthur and Heather Naldoza
Owners/Level 1 CrossFit Trainers

“I’m a wife and mother of four. I don’t have time for that.” That was my excuse for not exercising. In October of 2009 my friend encouraged me to run a 5k. Knowing I wouldn't be doing much running I agreed. After I finished I felt a sense of accomplishment that I had never known before. With my adrenalin pumping I foolishly agreed to run the Nike Women’s Half Marathon the following year. I began training. Running further and further every day. Feeling stronger and stronger everyday. I finished the Half Marathon and was amazed at how great I felt. I continued running after the half marathon, but felt I was lacking something. My husband encouraged me to do CrossFit workouts with him in our garage. I had no idea what a box jump or squat clean was, but I was game to try something new. I loved the workouts! 

The constantly varied workouts kept me wanting more. I will never forget the feeling of my first kipping pull-up. Breaking my PR on a dead-lift. Owning a CrossFit gym and being able to train others to experience moments like those are so fulfilling. We are a family at Rio City CrossFit. We all support, motivate, and push each other to new levels. CrossFit has changed me. I’m still a wife and mother of four, but CrossFit is something that I will always have time for. The question is, do you?

Everyone remembers his or her first CrossFit workout. Mine, well needless to say I was left crumpled on the floor looking like a wet, steaming pile of, well you get the idea. I really was hooked from that point on. I love the lifestyle. I also love sharing it with others and take pride when a member of our family reaches a new milestone or PR. I believe that everyone who trains at Rio City CrossFit is family. If you have done any research at all on CrossFit you have undoubtedly heard of the Group Dynamic that we CrossFitters are so proud of. We are social creatures and I believe we do our best work in the company of like-minded individuals. Step inside of our gym to see it and feel it. Try a workout to truly experience it! Our members range in age from teens to late fifties. All are welcome in our gym and we firmly believe that CrossFit is for everyone. We are committed to the basics and the foundational movements of CrossFit. Translation: we squat a lot! I have a Law Enforcement/Military and Martial Arts background primarily as an Officer, Agent, Tactical Operator and Tactical Trainer. I played organized sports through high school. Got into triathlons and Mud Runs as an adult. I still find the time to surf, free dive, kayak and snowboard. In late 2010 I received my Level 1 certification and have not looked back. To borrow an old saying “we sell steak not sizzle”.

In closing I would not have had the desire or opportunity to train and coach others throughout my life if not for one individual Dr. Charles L. Scott. He is also known as Shihan Scott to all of the students he has taught and mentored over fifty years as an educator and world-class martial artist. He saw something in my raw and untalented carcass all of those years ago and took me under his wing. He gave me my first “job” teaching the kids class. Little did I know how valuable that experience was to become. It helped make me who I am today and for that I will always be in your debt sir. 

Jake Guerin - Level 1 CrossFit Trainer

Although I was introduced to sports early on in my life, I didn't become a dedicated athlete until my freshman year of high school. I enjoyed playing sports but really lacked size and strength. Around 16 years old I turned towards weight lifting to help increase my athletic abilities. Through weight lifting I managed to pack on enough muscle to help me stay competitive all through high school and well into my post high school years where I also played semi-pro football. Weight training became my passion and a daily regiment that continued well into my late 30’s. After about 15 years of weight training I became very bored. The gains I had experienced early on in my life had flat lined and the joy of going to the gym was fading. I found myself going to the gym out of habit and not out of passion. Maintaining my current physique became my new way of life. However, the older I get the harder it's becoming to maintain all that I have achieved physically. I really yearned to find something different that would not only challenge me but redefine what I thought fitness was. I looked into a lot of different workout options that included boxing, UFC type training, P90X, and Yoga. Nothing was really catching my attention. Then a good family friend told me about CrossFit . What is CrossFit? I asked. I find it funny that at 43 years old I had never heard of CrossFit. I was so dedicated to the “traditional” way of fitness training I guess I never even considered it. At first I wasn't too sure  what CrossFit was or what it was all about.  However, it sounded interesting to me so I went to check it out.

I remember the first day I walked into the gym, aka the “BOX”. It seemed really strange and weird to me at first.  After all, this was not like the typical gym I was used to.  I was quickly introduced to the “WOD” or Work Out of the Day, met the other members, and was given some basic instruction. 3-2-1 boom! I was HOOKED!!! CrossFit has changed my entire outlook on fitness. The mental and physical challenges that CrossFit brings really feeds my inner athlete and I’m in better shape now in my 40’s than I was in my 20’s and 30’s. CrossFit is a lifestyle that has allowed me to do things I never thought possible.  I'm a big believer that if someone is looking for a program that actually gets real results and is willing to put in the work, CrossFit will do just that!  A CrossFit box will become your new home and what a better place to call home than here at Rio City CrossFit!

Tina Johnson – Level 1 CrossFit Trainer

I am a sixth grade teacher and a mother to three very busy and active children. I was an athlete in high school lettering in 4 sports. After having children my team sport time became limited and I wasn't as active. In 2012 I had gotten to a place where I didn't feel good about my weight and size. I had to do something. I started to go to Rio City and got hooked. I was in an environment that was positive and I began to see and feel a difference in my strength and body. I loved the team atmosphere while working individually. I got into a morning routine of working out daily before work that became part of my everyday life. Rio city became family to me and I couldn't wait to get up the next morning to not only get a good workout in, but to also see my crossfit family. 2013 was a rough year for me and I got through some pain with my Rio City family support. I got my level 1 certification at the end of the year and became part of the training team. It's been a great experience working with all our members to better themselves. I've learned that Crossfit is not a fad it's a way of life and I am grateful for my Rio City box for all it has given to me. I am a member for life. 

Mark Pfeifer - Level 1 CrossFit Trainer

3x Regional Athlete (2012- 2014)

1x California Super Regional Athlete (2015)

 I am from Garden Valley CA, a small country town an hour north east of Sacramento. Both my parents Ken and Darcie still live on the 25 acre property. My younger sister lives in Sacramento after recently finishing her service with the United State Naval Academy. I grew up loving athletics and have been involved sports my entire life. In 2012 I found CrossFit through a former collegiate teammate. When I found CrossFit I was in a bad place and I can truly say that this sport changed my life. CrossFit helped replace the competitive atmosphere of wrestling. Both wrestling and CrossFit are sports that you have togo to dark place and you have to like being there, I do. I think this is why CrossFit and I get along so well. I have the goal of qualifying for the 2016 Reebok CrossFit games and am working as hard as I can to achieve this goal. My efforts are accompanied by the efforts of Anjela Solorzano, wife, training partners Jose Gomez, Jason Ornellas, Sean Vasquez, and my coach Arthur Naldoza, whom many of you may or may not know. Thank you Rio City CrossFit for being the home gym that motivates me to do my best.

Stephanie Ledesma – Level 1 CrossFit Trainer

From the age of 4 to 18, I played soccer year round and enjoyed every part of it! Out of high school and throughout college, I kept up with soccer by playing indoor, outdoor and helping coach my cousin’s soccer team. I then had the urge to coach since I missed the sport and had a great time coaching young soccer players on how to succeed and enjoy the game. Coaching a sport I loved was a great accomplishment! Aside from coaching and doing the usual aerobic routine at the gym, I felt like something was missing. I then got an invitation from Arthur and Heather to try CrossFit – what’s CrossFit? I had no idea what CrossFit was about but was willing to give it a try. Well, my first WOD was short and intense and had me on my back for hours…I was hooked! Two plus years later, coach Arthur and Heather can’t get rid of me! I love the results I’m getting from CrossFit; setting new PR’s, creating new friendships, enjoying the community and now becoming a Level-1 Trainer. I’m honored and proud to start my new coaching chapter with Rio City CrossFit.

Brent Hosoume – Level 1 CrossFit Trainer

I have played sports all of my life. Almost since birth. Baseball, basketball, golf, martial arts, flag football. I did a lot of sports in the early years of my life. So I do consider myself an athlete. Before CrossFit, basketball was my way of staying in moderate shape. I started playing in kindergarten and continue to play to this day. Basketball stuck with me more than the other sports I played as a kid. I played in middle school and won a championship there, but did not want try out for the high school squad. So I found myself with almost no opportunities to continue to keep myself in good shape. Then Rio City CrossFit opened in July of 2011, run by two family friends. I was reluctant to go as I had not done anything since the end of the middle school basketball in January and did not want to seem out of shape. But I went anyways and was hooked from the first class. The first movement I learned was the deadlift, which I did totally wrong and ruined my back for the rest of the week. But I came back nonetheless. And have been coming ever since. In October of 2011, I was given another opportunity: to coach the middle school basketball team. Again reluctant, I accepted the position and ended up having a great time- so great I came back the next year and the next year. So now I coach a basketball team and coach a little at Rio City CrossFit, while working out on a daily basis. Well as Coach Arthur says: “We can rest when we die.”
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