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Our team

  • Natalie Knutson - Director of Wellness, Coach, & Personal Trainer

    CF-L1 Trainer

    Group Fitness Certification

    B.S. Exercise Science & Physical Education

    NSCA - Certified Personal Trainer

    NSCA - Special Populations Specialist

    As the previous owner and founder of Phatty Nattie's, my ultimate goal in life is to inspire individuals to be their best and to promote a healthy lifestyle of exercise, nutrition and a calm mind. My journey began when I had a moment in college that pushed me into the fitness industry and led me to my passion. During my sophomore year in college I went through a phase when I didn't realize how important my life, health and well-being were and I gained nearly 20 pounds in a 6-month period. A combination of stress and homesickness...I ate my worries away, and exercise was no longer part of my routine. During a pickup game of basketball, I ended up tearing my ACL for the second time. During my recovery I was determined to get back on track. I ended up losing about 30 pounds and was amazed at how my body transformed, but more important, how much better I felt about myself. I ended up graduating from UND with a degree in physical education and exercise science with a minor in health education. I am a certified personal trainer and certified special population specialist through NSCA, I am group fitness-certified, with specialties in Kettlebells, Drums Alive, Spinning and CrossFit. I have been teaching group fitness and personal training since 2007 and have been employed at Lake Region Healthcare since 2008.

  • Alisha Haugen

    NETA - Certified Group Fitness Instructor

    My journey began in July 2010, and it all started because I wanted to be healthier and set a good example for my husband and two children. A coworker invited me to go to a new workout class she had heard about from another friend. I started working out and taking a class here and there and then found myself going to multiple classes consistently every week. I started to feel more confident about myself and more in shape, and that good feeling of being fit and more in shape turned into wanting to challenge myself more and more so, I signed up for my first 5k in June 2012. Fast forward to 2018, I decided to take that next step; I earned my certification to teach group fitness classes, and started teaching classes in June of 2018. I also continue to challenge myself outside of that, and ran my first half marathon in June of 2018.

  • Dave Jensen

    Spinning Instructor

    Dave Jensen is an enthusiastic supporter of cycling in all its forms. While he got his start as collegiate runner, Dave turned his attention to cycling when he discovered the triathlon in 2005. Numerous wins on the road gave him the confidence he needed to try his luck off-road in 2007. After qualifying for the Xterra National Championship Race that year, Dave spent the following year living, working and cycling in San Diego, California. Deeply immersed in the fitness-crazed subculture of southern California, he continued to cultivate his love for cycling and group fitness. Upon returning to Minnesota the following year, Dave broadened his cycling base even further competing in the Minnesota Mountain Bike Series. He was named the top sport-class rider in Minnesota in 2011. After a disappointing 2012 season plagued by flat tires and mechanical failures, Dave found solace in the safe and predictable nature of indoor cycling. He received his spin training certification through Mad Dogg Athletics that same year, and he currently teaches group spin classes through Phatty Nattie's in Fergus Falls. Dave prides himself in his ability to help aspiring cyclists and individuals of all levels reach their fitness goals. Dave reached his own fitness goal in 2013, when we managed to cycle across America in 19 days to establish the Dream Big Scholarship, which benefits students of Minnesota State Fergus Falls. Dave went on to create a video documentary of his journey, which can be viewed on his blog,

  • Hallie Metcalf

    Certified Group Fitness Instructor, Certified Kettlebell Instructor

    My name is Hallie Metcalf and I am a group fitness instructor at Phatty Nattie's Group Fitness. Phatty Nattie's has done great things for me. I used to suffer from migraines, lack of energy and depression. My life revolved around my 4 children and I took little time for myself. My headaches were becoming a daily thing, and they were getting the best of me. I decided I needed to make some changes in my life to be at my best. In the spring of 2010, I decided to step out of my comfort zone and signed up for classes at Phatty Nattie's. Phatty Nattie's became a part of my day-to-day activities. I soon discovered I had more energy when I took time for myself and attended classes. My headaches decreased, and I'm happy to say my migraines are few and far between. I started feeling better about myself and I was happier. Along with my exercising, our family started eating healthier. It's so fun to see my children pick the healthy choice. Nutrition, health and exercise have become a new passion for me and I love it. I decided I wanted to help others who were struggling like I was. For me, it wasn't all about losing weight but finding a balance in my life, so I could be more productive and a better-functioning person. In the fall of 2011, I decided to pursue my group fitness instructor certificate, teach at Phatty Nattie's and continue pursuing a better lifestyle for my family and myself. In addition, I have completed Kettlebell certification. Along with raising my family with my husband, I work full-time at Otter Tail County as a Sr. Probation Officer.

  • Jessica Fosberg

    Certified Group Fitness Instructor, Certified Kettlebell Instructor

    My name is Jessica Fosberg, and I am a group fitness instructor at Phatty Nattie's. My journey with Phatty Nattie's started in 2009. Taking a Pilates class soon turned into adding in Pump-up classes and then a Cardio class. You could find me at the studio 5 days a week, and I loved it. I loved the way I felt and the physical condition of my body. In 2010, I became a certified group fitness instructor. Three years later I was pregnant with twins. I really wondered how my exercise routine would need to change as my pregnancy progressed. With close consultation with my doctor, I was able to continue teaching until I hit the 35-week mark. At 37 weeks, we were blessed with Megan and Lucas! Two perfectly healthy and happy babies. I felt fantastic and looked great my entire pregnancy. I can honestly say I never felt better. I attribute an easy pregnancy and a very fast and easy recovery to the time I spent at Phatty Nattie's, before and during my pregnancy. I jumped back into the studio life as soon as I could, not only for the physical benefits but also the emotional benefits of exercise. In 2017, we were blessed with the arrival of our third baby, Landon! My drive to teach and continue a healthy lifestyle has much more meaning now. Three very busy kids keep me on the go constantly. I also get to teach my kids what a healthy lifestyle is, and how much fun a healthy lifestyle is. Instilling a healthy lifestyle early will lead to a very healthy lifetime. My continued workouts ensure I have the energy to keep up with Lucas, Megan, and Landon. In addition to my time at the studio, you can find me in the Otter Tail County Land & Resource Management Office where I work fulltime as an inspector. Outside of that, you can find me chasing after our three very busy kids, keeping them as active as I can, and enjoying everything Otter Tail County has to offer.

  • Karoline Gustafson

    CF-L1 Trainer

    B.S. Health Promotions (Exercise Science)

    NSCA - Certified Personal Trainer

    NSCA - Certified Special Populations Specialist

    My name is Karoline Gustafson. I am one of the instructors at Phatty Nattie's Group Fitness. I grew up in Fergus Falls and was a 3-sport athlete. I played collegiate soccer at South Dakota State while earning a degree in health promotions (exercise science). I am a certified personal trainer and certified special population specialist through NSCA along with group fitness certifications in Spinning, Kettlebells and CrossFit. Following my playing career, I had to find a way to motivate myself to keep in shape, not only for my health and well-being, but also to be able to perform well at my job as a trainer at the Health & Wellness HUB (Lake Region Healthcare). Participating in area races allows me to use my competitive edge and keeps me motivated! I have finished 5Ks, 10Ks, half-marathons, marathon and half-marathon relays, triathlons, obstacle races, and completed my first full marathon in 2015! Throughout the training that I have done, I have really started to pay attention to my nutrition and how big a role it plays day-in and day-out. As a collegiate athlete, I used to eat whatever I wanted. Looking back, I wish I had known how better nutrition would have allowed me to perform better. As a trainer, I get to see the importance of health and nutrition across many demographics and the role it plays in a person's mental, physical, and emotional wellness. As a mom, I try to bring a similar sense of health and nutrition home. It is important to teach my family how delicious healthy eating is and how important staying active is.

  • Renae Sell-Lindgren - Coach & Personal Trainer

    CF-L1 Trainer, Certified Fitness Instructors, Certified Kettlebell Instructor, Certified Personal Trainer

    My fitness journey began 25 years ago, when I started jogging to lose weight after gaining 15 pounds in the first 2 years of marriage. My high-stress job triggered emotional eating, and I found a better outlet for the stress through running. It was through running that I was able to cope with additional life challenges, which included adding 2 beautiful daughters to our family, 3 devastating miscarriages, career changes for both my husband and me, and moving to Fergus Falls. So in an effort to fight the isolation from the move, I signed up for my first group fitness class. Although I had led a basically active lifestyle, it wasn't until I started participating in group fitness classes that I found motivation to really challenge myself. The social aspect of group fitness has been extremely important to me, as I found like-minded individuals who were encouraging and supportive. It was due to this fitness support network that my confidence began to grow and I started entering local competitions, including 5Ks, 10Ks, half-marathons and even a triathlon. I eventually made the choice to get my group fitness certification and Kettlebell certification as a way to pay it forward and inspire others to meet their fitness goals. I feel so blessed to be able to be a part of the Phatty Nattie's community!

  • Maria Hanson

    Certified Group Fitness Instructor, Certified Kettlebell Instructor

    My name is Maria Hanson, and I am a group fitness instructor at Phatty Nattie's Group Fitness. For me, it was in the summer of 2009 that I decided I needed to make a significant change. I had just had my 3rd baby, and though I was trying desperately to be the best wife and mother I could be, I was exhausted and unhappy. I didn't recognize myself in the mirror anymore, and I cried whenever I got on the scale. A friend told me about Phatty Nattie's, and so I thought I would give it a try. My life hasn't been the same. Though I was embarrassed about my fitness level and weight, I kept coming 2 days each week and started to see the inches come off as well as get more energy and make new friends. The 2 days turned into 3, which turned into 5, and I was hooked. I wanted to be able to continue my journey as well as share this excitement and passion for wellness with others to make an impact, and so in the fall of 2010, I decided to obtain my group fitness instructor certificate and teach at Phatty Nattie's as well. While I thought a few years into my journey the greatest way to be able to help others would be modeling the 50+ pounds I lost and energy I gained.... the Lord had other plans for me. With escalating medical issues, including slipped disks and pinched nerves in my back, fibromyalgia, leaky gut and hormonal imbalances, some of the weight came back on. My medications wreaked havok on my body and I could not exercise with the duration and intensity I was able to before. No matter what I did with my knowledge of fitness and nutrition, my body had other plans. I continued my positive exercise and nutrition habits, knowing they were keeping me going as well as possible and having faith that answers and healing would be found. What I did not anticipate was how long of a road it would be, but also how absolutely vital it has been to have my Phatty Nattie's friends on my journey. The friendships formed in our no-judgement zone have been life giving. Every single one of us is on a journey, and no matter how we look on the outside or ways we struggle on the inside, we are all beautifully and wonderfully made. We all have stories and experiences that can help each other live out our best lives possible. I teach group exercise because I absolutely need it mentally, physically, spiritually and socially... and so do all the amazing people that choose to show up and make their lives more abundant as well, able to then go forward into each day with vitality, strength, clarity, confidence and peace.

  • Missy Hexum

    Certified Zumba Instructor

    Through my life, I have been devoted to fitness and enjoyed the excitement of new activities. After found out we were expecting triplets, our lives changed, priorities changed. Trying to find time to fit in exercise was difficult and it had to be scheduled. Then, in 2010, I was told about a Zumba class at the Underwood School. It didn’t take long for me to want share my love for dance fitness. I became a certified Zumba Instructor in 2011 and continued my training by getting my Zumba Toning in 2012. These classes have evolved to a Dance Fitness class which allows us to incorporate different moves and music variety to class. I truly love to be apart of the and gaining energy from others in class! Most recently, I attended the Strong by Zumba training and so happy that I did. If you haven’t tried this class yet, you are missing out!! It’s a High Intensity Interval Training set to music, every move has a beat.

    My husband, John and I live near Underwood and are proud parents to our 3 girls. I am an VP, Wealth Advisory with Bell Investments. During the day, I help people plan for financial growth and after work I am lucky enough to help people with their health goals. Life can be very busy. Make sure to carve out some time for yourself.

  • Michelle Hoen

    Certified Zumba Instructor

    I didn't realize how important fitness was in my life until I stumbled into Zumba. My journey began when I won a free pass to a Zumba class in Fargo, North Dakota and I have been hooked ever since! I would drive over an hour each way, through ice and snow storms to get my Zumba fix. At the time, our area had nothing to offer for Zumba classes, so I decided to get certified to teach Zumba and inspire as many people as I could and that was in March of 2011. I am so blessed to have found my passion! We have changed our name to Dance Fitness as we incorporate so much more into our classes! I also got certified to teach STRONG by Zumba in February of 2017. It is a revolutionary high-intensity workout led by music to motivate you to crush your ultimate fitness goals! We are enjoying finding new ways to have fun workouts and burn calories and you get a total-body workout at our dance parties! We encourage you to come try out our classes.

  • Wendy Billie

    Master Yoga Teacher + Spirit & Life Coach

    Guided by higher her knowing, Wendy kicked off of her expensive high-healed shoes and walked away from a 15 year vocational path as a Director of Leadership Development for a prestigious global company. With bare feet and an exposed soul, she heeded the guidance of mother earth and returned to her indigenous self. The love of nature drew her to the Himalayan mountains of India where she studied Yoga & Ayurvedic medicine with a yoga philosopher and Swami and it was there her talents as a yoga teacher & holistic healer unfolded. Couple with yoga, her shamanic practice began when she was sought out by a shaman named Eddy. He stated Wendy knew "The Way." Humbled and once completely afraid; she now fully embraces her true voice as she speaks & teaches globally. As a master yoga teacher & Shamanic Practitioner, she helps you access the truth that lies within and all around. She helps people near and far connect deeply with their body, mind, & soul as they embark on a healthy life of authenticity. Wendy is also the creator and voice behind the podcast: Speak Your Truth with Wendy Billie.

    Wendy resides in Ottertail, and when not traveling, she loves sharing her gifts of teaching, leading spiritual wellness workshops and offering private healing & life coaching. Her students say "Wendy has a gift of reading each person's unique energy" and you'll soon find her light filled presence penetrating. When not on her mat, her gypsy soul roams near & far but you may cross her path frolicking in nature with her dog, Nina, drumming in her tipi, or burrowed in a coffee shop reading. You can find her full bio at

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