Arvada Staff 2018-01-03T11:56:22+00:00


Eric Ellenwood
Eric EllenwoodGeneral Manager
Eric has always had a tremendous passion for fitness, nutrition and overall health coaching. He has consistently strived to learn about exercise science and nutrition to better himself personally for over twenty years.
He utilizes this knowledge, along with his numerous professional Certifications to help others. His repertoire of clients run the full spectrum from completely sedentary to elite athletes, ranging in ages from 15 to 92.
Kara Mayock
Kara MayockPersonal Trainer
Kara is originally from the Massachusetts/Connecticut area. She moved her family to Pine, Colorado in 1997.  As a professional working mom of three children living in the mountains, exercise was a key element to maintaining a healthy work/life balance. 
She immediately took advantage of mountain sports, including climbing 14ers and regularly skiing/boarding with her children.

Kara has always been an exercise enthusiast. However, after experiencing the Personal Training difference as a client of Core Progress, she decided to put her passion for exercise and nutrition to good use and received her Certification as a Personal Trainer through the American Council on Exercise (ACE) in 2016.

Her philosophy on maintaining a healthy lifestyle is based on creating a realistic balance between nutrition and exercise. She knows firsthand that you can achieve results and maintain a healthy lifestyle without sacrificing all of your free time and fun.

Kelly Mcelhiney
Kelly McelhineyPersonal Trainer
Kelly is 24 years old from Bettendorf, IA. She has a strong background in athletics playing soccer, golf, basketball, snowboarding, and running cross-country and track & field since she was young.
Last May, she graduated from Iowa State University with her Bachelor’s degree in Exercise Science. With 1.5 years of experience in Division I weight rooms, completing a semester long internship at ISU, and a full year internship at CU-Boulder helping train all athletic teams, she is ready and willing to get anyone ready for the sport of living life. Upon completion of her internships she became certified through the NSCA as a Certified Strength & Conditioning Specialist.
Lance Henkel
Lance HenkelPersonal Trainer
Certified through the American Council on Exercise (ACE), my emphasis is on improving human performance with clients ranging from recreational to competitive athletes, youth to adult, fitness newcomers and long time enthusiasts.
A passion for fitness and investing in others led me to personal training and has been very rewarding. I’ve personally spent countless hours training and preparing to compete successfully in many areas such as NCAA Division 1 football (Iowa State University), numerous triathlons, cross-training and adventure competitions. I have had many people help me along my way and now I enjoy sharing my knowledge and experience with others to help them reach their wellness, fitness and athletic goals.

My motto is, “Training for the athlete inside everyBODY!”

Oscar Miranda
Oscar MirandaPersonal Trainer
Oscar has a love for travel, adventure and self-development and his energetic personality shows in his approach to how he gets you results. His obsession is making sure you succeed in whatever goals you set.

He always provides fun and engaging workouts that focus on your specific needs and keep you moving forward. He also understands that reaching your goals involves much more than just an hour or two per week in the gym and that other parts of your daily life also need to change. He helps you focus on how to strategize these other areas in order for you to be successful beyond your initial goals.

Oscar gets you from overworked, overstressed and overwhelmed to become focused, fit and re-energized with an approach that suits your individual fitness level from complete beginner to seasoned gym vet. He encompasses nutrition, exercise, recovery and other strategies that get you where you want to be in the time you want to get there.

Kelly Schreuder
Kelly SchreuderPersonal Trainer
Kelly grew up in the suburbs of Chicago where she fell in love with sports, specializing in swimming, lacrosse, and water polo. Kelly graduated from Purdue University with a B.S. in Dietetics and a B.S. in Nutrition, Fitness, and Health.

Kelly developed her passion for fitness by becoming a group exercise instructor at Purdue, where she taught cycle, yoga, Insanity, body sculpt, and Tabata. As an ACSM personal trainer, specializing in strength and conditioning, she loves helping people reach a new level of fitness. And she is excited to share my passion and knowledge in nutrition and fitness to help you achieve your goals!

When she is not in the gym she loves backcountry skiing, traveling to new mountains, and hiking with her rescue dog. Kelly graduated from Purdue University with a B.S. in Dietetics and a B.S. in Nutrition, Fitness, and Health. After graduating she moved out to Colorado for a strength and conditioning internship working with all different types of clientele ranging from high school athletes to weight loss and rehabilitation clients.

Jeff Lewis
Jeff LewisPersonal Trainer
Jeff is a Colorado native and a graduate of Metro State University of Denver Colorado.
He received his B.S. in Human Performance and Sport – Exercise Science with a minor in Nutrition. Jeff is also a Certified Sports Nutritionist through the International Society of Sports Nutrition.

He has experience in training NFL and other professional athletes, youth and collegiate athletes, as well as collaborating with physical therapists to rehab those with sport or other physical related injuries. Jeff has also competed in and coached athletes for NPC bodybuilding competitions. He specializes in functional training, Olympic weightlifting, sports specific training, and correcting biomechanics. He also heavily focuses on coaching nutrition to excel those towards their goals.

His true passion lies in human performance and movement. Having grown up overweight and playing sports, Jeff believes it is important to achieve your “ideal you” using functional training. Long lasting success and a fit and healthy lifestyle is achieved by looking the part, while being able to perform the part. He believes there is no greater feeling than helping someone start their journey from the ground up without ever hitting a ceiling.

With his experience, Jeff believes working on the foundational movements, fixing nutritional habits, and getting a solid customized program in place is the key to success for anyone looking to improve their performance, strength, muscle gains, and/or weight loss.

Jarrett Crockett
Jarrett CrockettPersonal Trainer
Jarrett Crockett, born and raised in Colorado, received his Bachelors of Science in Health and Exercise Science from Colorado State University. While at CSU, Jarrett developed a passion for helping push athletes of all ages to reach their goals.

After graduation, Jarrett became a Certified Strength and Conditioning Specialist through the National Strength and Conditioning Association.

Jarrett’s background in athletics and sports performance training allow him to bring a unique perspective to his training at Core Progression. Jarrett likes to remind his clients that everyone has a different journey to reach their goals, “don’t compare your chapter 1 to someone else’s chapter 20”.

When he is not working in the gym, he is either coaching youth and high school baseball or up in the mountains snowboarding, golfing, or fishing.

  • I believe in the power of positive think and recite affirmations every morning.
  • Between coaching and training, I have accumulated 10 years of helping others reach the goals and dreams.
  • When it comes to relaxing I prefer staying at home with my wife and dog watching a documentary.


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Core Progression