With natural light and magnificent views, you will feel inspired while taking your workout to the next level with a variety of group class offerings, including TRX and The Knockout Workout.




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For the barre enthusiast or novice, this variation on the traditional barre class will get your heart rate soaring! Expect to have up to 8 sections of class dedicated to cardio; and don’t worry! All levels will be accommodated.

This class will use various methods of training to challenge the body in various ways to strengthen and improve cardio capacity.

Cardio Chisel
This class focuses on endurance weight lifting. Each major muscle will be effectively toned and trained for a full body resistance training workout. Class is infused with short bursts of cardio output.


Core Chisel
This class focuses on endurance weight lifting. Each major muscle will be effectively toned and trained for a full body resistance training workout. The class ends with a long session of abdominal work.

High Energy
Improve your cardio capacity quickly in this class! Various methods of training are incorporated to challenge the body in numerous ways and to keep "mixing it up!"

HIIT Tabata
Combine the best of two training styles! Enjoy traditional Tabata system workouts mixed with high intensity interval training for maximum calorie burn.

INSANITY is a revolutionary cardio-based total body conditioning program based on the principles of MAX Interval Training. By using MAX Interval Training, INSANITY pushes the participant to new training heights, resulting in more calories burned, faster results, and a more efficient metabolism.

KnockOut Workout
Get put through the paces with this traditional kickboxing program. Use pads, gloves and weights to improve strength, stamina, and technique. Open to beginner/novice participants, however all levels are welcome.

Pilates Barre
This class isolates the major muscles of the body for a burn that is like no other! Enjoy the lengthening, toning effects of ballet and Pilates, fused with intense focus and determination.

Utilizes the Bridge system, a piece of equipment that involves Super Functional bars, monkey bars, kickboxing bags and more, while taking participants through a circuit style workout.


This High Intensity Interval Class utilizes the Bridge system, a piece of equipment that involves Super Functional bars, monkey bars, kickboxing bags and more!  Expect to sweat!


Utilizes the Bridge system, a piece of equipment that involves Super Functional bars, monkey bars, kickboxing bags and more, with a focus on TRX training.



Tamara Donelson, Circuit Training
Certifications: Saris Power Cycling Instructor, ACE-Certified Personal Trainer, New Leaf Metabolic Assessment Administrator, APSI Level 3 Certified Ski Instructor, Peak Pilates Chair Certified, American Heart Association-CPR; Bachelor of Physical Education, Australian College of Physical Education; Certified Fitness Instructor – Fitness Institute of Australia


Born and raised in Sydney, Australia, Tam found herself chasing endless winters and living in Edwards, Colorado.  Dirt has taken the place of snow and this is where Tam spends her time. She embraces mountain biking, XTERRA triathlon or her new fall fun, Cyclocross – bring on the Mud!  Tam is a licensed USA Triathlon and USA cycling coach. 


She spends her days as a leading personal trainer and cycling coach at the Club. Inspired by helping people to discover their best performance, and surprise themselves in their own ability, she started Donelson Coaching where she coaches athletes of all levels. Tam also shares her passion for cycling through coaching The Cycle Effect, a non-profit organization that provides brighter futures to young women through mountain biking, which she co-founded with her husband.

Christy Madison, X FIT and Winter Sport Conditioning
Certifications: NASM CPT, TRX Suspension. Christy has always had a love for being active and helping others. She grew up in the valley and loves to hike with her dog, run, snowboard, and laugh with friends. Working out has always been a hobby and she enjoys assisting others in reaching their fitness goals.  Her desire to help others accomplish weight loss and overall fitness goals developed after she was able to conquer her lifelong struggle of being overweight. 


She worked diligently for many years on her diet as well as staying active to finally see her hard work pay off when she lost 30 pounds.  She strives to hold people accountable for one of life’s most difficult obstacles.  Because she’s conquered the task of weight loss herself, she knows what it takes and wants to share her knowledge and help others see the results they’ve been dreaming of for years.

Mike Dorr

Mike Dorr is a CPT with TRX, Gym Jones Level 1 and Strong first Kettlebell Instructor Course certifications, and a special place in his heart for core & Olympic lifts.  His workouts engage multiple muscle groups.  He strives from strength improvement and lean muscle development with each client.  He is passionate about form first before adding weight. 

Deb Plath
Certifications: AFFA Personal Training Certification., BASI Pilates,. Zumba Dance, TRX., Johnny G Spin training and Booty Barre certification. Deb has been teaching group classes in the Vail Valley for over 25 years. Deb’s own fitness routines led her into personal training, Pilates equipment, and private group classes. Living in the mountains it gives so many options outdoors, winter, summer and fall for activities. As a trainer, Deb loves giving as many options indoors too.

Nathalie Joly

Certifications: CGT, Basi Pilates Mat, TRX, Barre Forte, Tabata, P90X & Insanity, Total Body Strength Conditioning. Nathalie was born and raised in Belgium, until she moved to the Vail Valley where she has been living since 1991. She loves teaching a variety of group classes and helping people achieve their goals by promoting a healthy and active lifestyle.

Austin Stauffer

Austin Stauffer moved to Colorado 6 years ago from Holland, Michigan to pursue a career in the ski industry.  He is currently a ski school supervisor in Lionshead. Austin has his full PSIA Certification in Alpine Skiing. He also is certified in teaching group fitness and bootcamp classes. Some of Austin's biggest passions include skiing, lacrosse, biking, hiking, and camping. He has always been passionate about teaching athletics to others. He loves spending a few days a week coaching lacrosse to middle school students.  

Missy Lacy
Certifications:  Barbara Hutner Barre. Missy has an extensive background in the fitness industry, and has been teaching Pilates for many years. She enjoys leading her students through a vigorous workout. You’ll catch Missy teaching cardio reformer, as well as traditional equipment classes. 


Missy leads class with enthusiasm and enjoys seeing her students have fun. She believes Pilates is a full body workout, and presents her classes in a way that is accessible to all levels. Originally from Birmingham Alabama, Missy enjoys living in the mountains and the outdoor activities it has to offer.  Missy teaches Pilates Reformer and Barre throughout the week. Her passion is her daughter!

Bratzo Horruitiner

Bratzo Horruitiner was born in Peru and has been living in the Vail Valley for over 15 years. He has practices martial arts for most of his life, and has been teaching since 1999. He has trained with several highly accomplished and renowned martial artists, which allowed him to gain a deeper technical understanding of boxing, kickboxing, and Muay Thai. He has developed curriculums and camps for both professional and amateur fighters.  Bratzo feels passionately about empowering others through the practice of martial arts, providing them with the opportunity of becoming fit, building confidence and self-esteem, as well as a stronger self-concept. 


Donna Barnett 

Donna brings her love and zest for life into each of her classes.  On top of being a mom to three boys, she loves to get outside and be active and enjoy the Colorado sunshine!  Donna teaches Pilates barre, Barrebata, QXWorx and personal trains.  She is a great resource for anyone looking for a little push toward their goals.

Chad Armijo 

Chad is a former missed marital artist, high school wrestling coach, and trainer to the Commerce City PD.  He understands whit it takes to deliver quality instruction to a variety of personalities.  In addition, he is uniquely aware of injuries pertaining to the joints and back due to years of wrestling and missed martial arts.  He is well-versed in varied teaching methodologies and holds a Masters of Science in Adult Teaching.  Chad is always ready to the get the best you out in front!

Josiah Middaugh, NSCA - CSCS

Josiah Middaugh is the 2015 XTERRA World Champion. An 11-time XTERRA USA World Champion and 6-time USSSA National Snowshoe Champion, Middaugh is well known throughout the Vail Valley as an elite level, multi-disciplined athlete. He coaches the Athletic Club’s Masters Swim program and coaches athletes of all levels and aspirations through Middaugh Coaching.  He is a Certified Strength and Conditioning Specialist through NSCA, and holds a Master’s degree in Kinesiology.


Spa: (970) 790-3020
Athletic Club: (970) 790-2051

Located in The Westin Riverfront Resort & Spa

126 Riverfront Lane, Avon, CO 81620 

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