Core Fitness & Nutrition
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Core Fitness & Nutrition
Online fitness training to help you achieve your fitness goals while staying safe at home. Dennis is great! I have tried many different exercise routines and this is the one I have stayed with the longest (over 2 years). With Dennis, I don't get bored because he switches up the routines. The best part is he comes to you so you can't blow off a workout - and it only takes 30 minutes.

No gym membership needed! Core Fitness is a smart investment on my own health. Dennis is the real deal. No gimmicks, no "trendy" workouts/diets for sale here. He is simply an encouraging, challenging, and supportive fitness trainer who wants the best from his clients. I love that the workouts you get are so connected to everyday movements- functional exercises- that help you run better, lift better, bike better.
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When the pandemic happened in 2020, I knew I had to protect my clients' health as well as my own. It didn't make sense to continue working with clients inside their homes. I realized I could offer my same personal training services to my clients as an online personal trainer in order to keep them going and to protect everyone for the time being.
What do you think of when you hear about working with a Fort Collins in-home personal trainer? Does it conjure up images of muscle-bound personal trainers in a gym, holding a clip board and yelling at their clients to get, "ONE MORE!" while they look at the latest text message on their phone and think about the next supplement they are going to sell to you?
In 2018, I am starting to focus more on working with clients that need assistance with their post-physical therapy needs. In the last 15 years, I have worked with a host of clients with varying physical limitations. I was approached this year by a Fort Collins physical therapist that was working with one of my existing long-term clients to see if I was interested in taking on more post-physical therapy clients.
In 2013, I began working with special needs adults. I now have the pleasure of training two wonderful young adults with autism and one wonderful young adult with Down syndrome. Working with the special needs adults population is a little different from training other clients; however, there are also similarities.
My wife and I, after 25 years of start-and-stop exercise, found Dennis online last year. We met at our house and he explained his process for functional fitness. We liked the idea of building strength and cardio for everyday life (going to the gym to build 'ego muscles' was never very motivating).
Reviews (10)
Pam Autio
Pam Autio
Dec 16, 2021
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I usually don't take the time to leave reviews online and I rarely give someone 5-stars. For Dennis and Core Fitness, however, I will make the exception. Dennis is a knowledgeable and skilled personal trainer who is committed to helping clients achieve their fitness goals. I have been working with Dennis for about 9 months and have dramatically improved muscle tone, strength, and have lost almost 30 pounds. It is rare that I get an opportunity to work with someone who is as dependable and dedicated as Dennis is, so I am happy to recommend his services to anyone who is interested in becoming healthier
Jon Thompson
Jon Thompson
Sep 22, 2021
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My wife and I, after 25 years of start-and-stop exercise, found Dennis online. We met at our house and he explained his process for functional fitness. We liked the idea of building strength and cardio for everyday life (going to the gym to build 'ego muscles' was never very motivating). We also liked the idea of a 30-minute workout three times per week (because staring down the barrel of a 60 or 90 minute workout wasn't sustainable for us). So, we signed up. Here we are over a year later, and this is the first time in our lives outside sports as kids that we have worked out this consistently for
Julie Stenger
Julie Stenger
Jul 05, 2019
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In 2014 I had a level-three disc herniation in my cervical spine with radiculopathy (including high levels of pain, weakness, and numbness) of my right shoulder, arm, and fingers. Afterward, I was very limited in what I could do physically for more than two years while I healed. Before my injury, I weighed 135 pounds, had an active lifestyle, and was in good physical shape. After my injury, my physical fitness and my emotional wellbeing slowly spiraled downward in a relentless cycle – fed by the fear of reinjuring myself and resulting in a sedentary lifestyle and unhealthy eating habits.
I joined
Dustin Eslinger
Dustin Eslinger
May 16, 2018
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Fantastic guy to be around and a great trainer. I’ve been working with Dennis for almost 2 years and he always finds a way to change things up by offering a large variety of different workouts.
Lauren Fry
Lauren Fry
Dec 26, 2017
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Dennis was an absolute game changer for me. I spent years (years!) trying to manage my diet and exercise by myself. I tried everything from gym classes, in home machines, Weight Watchers, and even juice fasts!
What Dennis did was provide me with a reason to be accountable (he's coming, rain or shine!), a method to redefine what success means, and a detailed understanding of my capabilities and limits so we were always pushing the envelope. I wasn't sure that I could put up with the ego of a personal trainer or keep up with a true workout pace. I was winded carrying my luggage through the airport
Jacquelyn Watson-Rodriguez
Jacquelyn Watson-Rodriguez
Jul 29, 2017
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Where do I start with Dennis? Well, in a nutshell, he changed my life.
In March 2016, I took a vacation to my hometown in Florida and found myself crying next to my partner as I looked at photos of us on the beach. I had hit my final breaking point. I was at my highest weight, my lowest self-esteem, and even found myself struggling to catch my breath as I walked up a flight of stairs.
Finding and hiring Dennis as my personal trainer was one of the best things I’ve ever done.
I knew he was committed to helping me reach my goals the first time I met him. Instead of me interviewing him, I noticed
Teah Romano
Teah Romano
Jul 11, 2016
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After about 3 years of continually struggling with the way my body was changing and feeling like it was out of my control, I reached out to Dennis. And I am so glad I did. I had done plenty of programs in the past and really started my weight loss journey in January 2015. I hit the "plateau" as many people know in June and July, which is when I decided to find a personal trainer that fit my needs and schedule. Dennis was wonderful to work with! After nearly 8 months of working with him I lost almost 12 pounds. That may not seem like a lot, but for someone like me who worked incessantly on my own
Verlane Saxton
Verlane Saxton
Sep 08, 2015
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At the ripe old age of 64, I knew I needed to do something to ward off the effects of being undisciplined with my diet and physical activity most of my life. With a strong recommendation from a friend who had had incredible results working with Dennis for a couple years, I knew it was an opportunity I could not turn down:) Now after two years with Dennis as my personal trainer coaching me through 2 workouts per week, I can testify I have not only lost weight, but, more importantly, I am stronger in all areas of my body! The strengthening has allowed me to do things I could not do before (i.e. walking
Suzanne Barr
Suzanne Barr
Jun 06, 2014
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Dennis is the best personal trainer ever...truly! After a few workouts, I was doing things I didn't even know I was capable of! I will never train with anyone else. If you're looking for someone to take your money and go easy on you, Dennis is NOT your guy. However, if you want a serious trainer that will work you to your fullest potential and help you meet your goals, give Dennis a call. Not only have I lost weight as a result of his workouts, but, my flat tummy is back! Woohoo! Thank you Core Fitness!!!
Esther Hansen Rdn
Esther Hansen Rdn
May 26, 2014
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Dennis is the most compassionate, intelligent personal trainer I've met. Not weak compassionate - he will deliver challenging, science-based, targeted workouts - but caring compassionate. He takes time to understand your story, what makes you tick and cares for you as a whole person. He is never judgmental but is encouraging, patient and delivers results! You're in good hands.