About Us

 Our mission: Feel Better, Move Better and Look Better, through functional fitness and proper nutrition in a fun, challenging and educational environment; conducive to success for each person.

Here is what you can expect from us: You will not find another full service, face to face fitness company like us in our area. We don’t just create workouts or put you on machines; we create an environment where people can get better.  Move better, feel better, look better. You will find joy in fitness again and learn new lifestyle habits that can literally change your life. We have a “whole body” approach to helping you reach your goals, and it is through exercise, nutrition, mobility, accountability, motivation, and support that not only we give to each client but that each client in turn gives to each other. We call it our fitness family – because that is what we are. And you can’t get that anywhere else in the Napa or Sonoma Valley!  We guarantee it or we will give you your money back.  We simply want you to be better after working with us than you were before.

Jeff Larson
Owner/Program Director/Success Coach

Jeff grew up in Pearl City, Honolulu, Hawaii . He competed in Track and Field, Football, Judo and Kenpo Karate from childhood throughout high school. He earned his black belt in Karate and earned “Most Outstanding Competitor” award in Karate two years in a row and then went on to teach Karate for three years.

Jeff has been a part of the Napa Valley community since 1983. His passion for sports, fitness training and helping others led him to coach Napa Youth Football for 9 years. He loves to spend his free time outdoors, hiking, mountaineering, rock climbing, camping and spending time with wife Tiffany and their children.

Jeff has extended his knowledge of health, nutrition, and fitness by constantly continuing his education in physical fitness and bodywork. He is dedicated to helping each and every one of his clients capture their fitness goals through proper training, form, and nutrition. Jeff is dedicated to helping each person achieve their goals with safety being the number one priority.

In addition to creating the program design for boot camp, teaching boot camp classes and kettlebell classes Jeff specializes in corrective exercise and alternative pain management techniques such as foam rolling, stretching, massage therapy, trigger point therapy and kinesiotape to name a few. He is available to help each boot camper with their recovery and regeneration so they not only look better from fitness but feel better along the way.


  • N.E.S.T.A. – Certified
  • Personal Trainer
  • Functional Training Specialist
  • Core Conditioning Specialist
  • Adventure Fitness Trainer
  • Online Personal Trainer
  • Nutrition Coach
  • U.S.A.W. – Sports Performance Coach
  • Crossfit – Level I Coach
  • RKC II Certified
  • Certified Functional Movement Specialist
  • KBC – Level 1 Kettlebell InstructorKettlebell Certification for Fitness Professionals
  • Napa Valley School of Massage – Certified Massage Therapist(Swedish & Okazaki’s Deep Tissue)
  • Healing Arts Institue – Certified Deep Tissue Massage Therapist
  • Healing Arts Institue – Certified Sports Massage Therapist
  • CKTP –Certified Kinesiotape Practitioner
  • Certified Integrative Movement Specialist

– Jeff specializes in alternative pain management methods and corrective exercise and regularly coaches one on one & semi-private training as well as Napa 5:30am Fridays.

Tiffany Larson

Tiffany is a Napa native. She graduated from Napa High School and Napa Valley College. She has developed a passion for fitness and wellness and helping others reach their goals by conquering obstacles.

She and Jeff married in 2001 and after having children she found herself at 217 pounds and not sure how it happened or how to get back. Determined to find herself again and achieve better health she started attending boot camp 5 days per week and never looked back.

Her belief: Fitness and wellness is journey, you never actually arrive, it doesn’t happen today or in 4 weeks or a year. It happens everyday of your life.

Tiffany helps clients in the program by offering support, answering questions and managing the boot camp program. She understands the stress of being a wife, a mommy, an employee and a business owner and can relate to the many obstacles we all face when it comes to making self care and fitness a priority in your life. She works behind the scenes making sure each boot camper has all the information and motivation they need to succeed at discovering and reaching their goals.

Melissa Chester

melissaMelissa Chester is a native of American Canyon. She graduated from Vintage High School, and then went on to receive her Bachelor of Arts Degree in Child Development, as well as her Multiple Subject Teaching Credential both from Sacramento State University.

After teaching both preschool and first grade full-time for several years, Melissa decided to take a few years off of to be a full-time mom.

After a couple of years, it was time for her to go back into the work force, but decided that administrative work and customer service was where her passion was. After a brief stint of living in the Los Angeles area for about a year and working as an Administrative Assistant and Office Manager at a Montessori school, Melissa came back home to American Canyon and fell upon the position as the Office and Client Services Manager at Fitness Revolution/Napa Adventure Boot Camp/Athletic Revolution.

This current position allows her to combine her extreme enjoyment of administrative work, passion to provide the highest level of customer service, put smiles on clients’ faces, and to be a mom as well.

When she’s not in the FR/ABC/AR office, Melissa is a very proud mom to her fun-loving, energetic, and spunky daughter, Camryn.  Her various hobbies include walking and running outdoors, hiking, swimming, biking, and entering different 5K, 10K, and half-marathon races.  She also especially enjoys watching sporting events, dancing, listening to music, spending time with her friends, traveling, sightseeing, reading, cooking and volunteering her spare time helping her husband, Kevin out with the swim teams he coaches out in American Canyon.

– Melissa is our Client Care Expert and is in the office Mon-Fri 8am to 12 noon.


Joanna Mittman

Joanna has personally experienced the success that awaits the boot camper who puts her or his mind to achieving fitness and weight loss goals. She started attending boot camp in 2006 in the hopes of getting out of her gym membership rut. Fairly fit, but also overweight, she trained hard, lost fat, and grew strong and fit, but she still wanted to lose more weight. Although Jeff often asked about nutrition and told her to journal her food, she didn’t see the need because she was not a junk food eater, or even a sweets eater. She ate what she believed to be a pretty healthy diet (except maybe for those couple of glasses of wine after work every evening).

Finally, after buying her first pair of size 16 pants, Joanna attended a Boot Camp nutrition seminar on January 9, 2009. Jeff’s nutrition information clicked and the next day she began following the Rapid Fat Loss program and journaling her food (turns out she was a carb junkie). 35 pounds and 6 pants sizes later, she has become a Boot Camp trainer to share her enthusiasm for hard workouts with excellent technique, improved fitness and conscious nutrition choices. Boot Camp changed Joanna’s life, and she knows it can change yours too!

Aside from training at Boot Camp, Joanna is an attorney and a teacher at Napa Valley College. She has two wonderful grown children, who have always supported their boot camp addicted mother.


  • N.E.S.T.A Certified Personal Trainer

– Joanna regularly teaches the Napa 6:00pm sessions.

Tay Espinosa

Tay Espinosa was born in Chicago but raised mostly in Miami Florida. After graduating from the University of Miami with a bachelor’s degree in nursing Tay was commissioned as an officer in the Navy Nurse corps. She was stationed in the bay area where she met her husband Julio, a career naval officer.

In 1991 she was deployed to the Persian Gulf on the hospital ship, Mercy in support of Desert Storm. During the 9 month long deployment she began to run to work off stress. This habit continued upon return to the United States but seriously took hold about 10 years later when she ran her first marathon with Team in Training. The thrill and camaraderie of training for endurance events contributed to her interest in fitness and a healthy lifestyle. Going to a gym did not provide motivation or the “fun” factor she craved in her workouts until she found Adventure Boot Camp.

Tay has been an avid “boot camper” for 4 1/2 years. She has achieved and maintained a superior level of health and fitness through working with Jeff and Tiffany. Having the demands of two children, age 16 and 11, and a very busy husband she strives to take care of herself so she can take care of her family. As a coach, Tay wants to help others reach their health and fitness goals. She believes everyone has the capability to achieve a healthy lifestyle with the workout and nutrition support of Adventure Boot Camp.

  • N.E.S.T.A Certified Personal Trainer
  • Precision Nutrition Level 1 Coach

– Tay regularly teaches Napa 9am and 12:10 sessions and is our Nutrition Coach

Derrick Clark

Derrick was born and raised in Detroit, Michigan.  Being one of five siblings taught him the importance of teamwork at an early age.  He grew up loving team sports, such as basketball, football, baseball, and soccer.  Basketball was his favorite so he pursued it with great hopes.

He had developed a great work ethic which drives his efforts today.  He became one of the top basketball players of his class in high school and was part of the State Championship Cross Country Team.

Derrick received an athletic scholarship and attended Cal State Dominguez Hills where he studied Education and obtained all- conference honors his junior and senior years for hoops.

Coach Clark began his coaching career at his alma mater as an assistant coach on the collegiate level for three years gaining experience under a great teacher, Dave Yanai.  He then took advantage of an opportunity to pursue a career in basketball overseas. He played in Germany for seven years, one of those years as a player-coach.  He is a certified high school level official for basketball and officiated football on the semi-pro level as well.

He has been on the Youth Development Team at his church for eight years and owns the responsibility of Special Events Coordinator.  He’s also coached men’s and women’s basketball of all ages for ten years.

Coach Clark has redirected his love and passion to exercise fitness and nutrition to meet a greater need.  He says, “Not everyone can play basketball, but surely most everyone can exercise and eat right”.  “It brings me great joy to see others improve their health and well being”.

Derrick’s passion for sports, fitness, and helping others achieve their goals, makes him a perfect fit for our staff.  His motivational skills, passion at what he does, and coaching ability will inspire you to be the best YOU that you can be!

– Derrick regularly teaches the American Canyon 5:00 am classes.

Carson Carattini

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Carson is originally from San Jose, Ca, but has lived all over the Bay Area as well as spending some time in Charlotte, NC. He is a lifelong athlete, playing basketball and football, but mainly baseball starting from the age of four all the way until the completion of High School.

While playing competitively may have ended, his passion for athletics never did, as he played intramurals in college and hoped to pursue sports at a professional level. In 2002 he began a coaching career, teaching middle school sports in the South Bay. Since then he has moved through the ranks coaching, club, high school and college basketball. Currently he coaches men’s basketball at Napa Valley College. His passion for teaching athletes to be successful both on and off the court is what keeps him motivated and enthusiastic about coaching.

Shortly after becoming a resident of the Napa Valley in August of 2011, Carson connected with Fitness Revolution/Athletic Revolution. Seeking a way to integrate fitness and basketball, FR/AR was an obvious fit. It was only a matter of time until he found the added benefits of camp. He hopes to share his passion of fitness and athletics with clients throughout the Valley, not to mention the vast array of knowledge and assistance FR/AR has to offer.

Carson, his wife of four years Katherine and their new son Conall, are really enjoying their new home in the Valley and their experience with FR/AR. They have found comfort in the family FR/AR has provided, and are off to a great start of a lifetime of health and fitness.


  • N.E.S.T.A Certified Personal Trainer
  • I.Y.C.A. Certified Youth Fitness Specialist I
  • Certified Functional Movement Specialist

– Carson regularly Coaches the St. Helena 6 am sessions, Napa 8am and our Athletic Revolution Youth Athlete Sessions.

 Robin Dunbar

Robin Dunbar rotatedRobin grew up in Oregon, graduating from the University of Oregon with a degree in Business Management.  While at school, Robin started running as a fitness regime and hasn’t stopped since, often running 5- 12 miles which now complements her overall routine at Napa Adventure Boot Camp.

Robin has attended boot camp since October 2012 and fell in love with the complete body workout,  nutritional  programs and advice. Working as a retail executive for 32 years and not making as much time for working out, she has now learned to prioritize health and fitness because of how rejuvenated she feels.  Robin is so passionate about living a healthy life, she decided to make coaching her second career in order to help others reach their fitness goals. She enjoys the social aspects of boot camp and is inspired watching campers transform themselves physically and mentally by working out and having fun at the same time.  Robin is a NESTA Certified Personal Trainer.

Robin enjoys her life in the Napa Valley living in Yountville with her husband John, Cavalier King Charles Spaniel, Barkley and 2 felines named Briscoe and Munch.

– Robin regularly teaches the Napa 5:30 am classes.

Courtney Pierce


Courtney Pierce is a third generation Napa native who has always loved being active. She was a competitive athlete throughout high school and college. She graduated from UC Santa Barbara with her BA in Psychology and went on to work in the fashion industry. After a decade of managerial work along the West Coast, she decided to move back to her home town and focus on her passion for fitness.

In order to stay motivated, she tries to participate in one event every month. She is an avid runner who logs in anywhere from 10-30 miles a week. Recently, she added cycling to her workout mix as well! She has found she is the happiest when working out daily and wants other people to find that level of happiness for themselves. When she isn’t training she still loves fashion, traveling, and photography.


Courtney heard about an open coaching position at Fitness Revolution through her close high school friend and long-time boot camper. After falling in love with the ideals and values of Fit Rev, she completed the internship program with Jeff.  She is certified as a Personal Trainer through the National Association of Sports Medicine (NASM) and is also CPR certified from the American Red Cross for both adults and infants.


  • N.A.S.M. Certified Personal Trainer

-Courtney regularly coaches our Napa 9:00am, 5:15pm, 6:00pm


Patches“Patches” is the Fitness Revolution Napa Mascot!  The Larson Family rescued her from the shelter in September 2013.  She is sure to give you a sweet, gentle and irresistibly cute welcome anytime to stop by the Enterprise, Napa office!  She loves to walk.  No long runs but she loves to sprint and jump.  She believes that rest is an integral part of being healthy, which is why she spends most of her day napping at the gym!

She is loved by all who meet her!

If you need some unconditional love, swing by the office and say hi anytime!







Support Staff

John Spencer Ellis has been a fitness educator for over 14 years. In this time, he has trained over 2,000 clients and 40,000 fitness professionals.

The combination of John’s formal education, practical experience and fun approach to exercise, have made his camps very exciting and popular.

“John is a combination of Tony Robbins & Jack Lalanne.”

The New York Post
“I look forward to having you experience this unique fitness adventure. There is truly nothing quite like it!” – John

John has been involved with health and fitness since the age of twelve and has become one of the most diversely trained fitness professionals in the United States. He holds two bachelors degrees; one in business and the other in health science, an MBA, and a doctorate in education. He has more than fifteen certifications, which include being a certified massage therapist, plyometric instructor, self-defense instructor, fitness kick boxing instructor, water fitness instructor, exercise rehabilitation specialist, golf conditioning specialist, Pilates instructor, personal trainer, clinical hypnotherapist, master PACE circuit training instructor, and yoga instructor. John has a 2nd degree black belt in kung-fu, has completed the Ironman triathlon and finished 5th in the U.S. National Biathlon (run/bike) Championships. He has extensive training in mind-body fitness and alternative health. John is the author of “How Badly Do you Want It? – Your Ultimate Guide to Optimal Fitness,” a contributor to “Power of Champions,” and the Fitness Editor of OC Flair magazine. His fitness articles and interviews have been featured in over 30 publications, and he is a frequent consultant to the world’s media on health, fitness and lifestyle topics.

His medical training includes being a licensed radiological technologist, certified medical assistant, and training in McKenzie rehabilitation exercises. He has worked in fitness centers, medical clinics, and has promoted sporting events in California.

In addition, John is on the Advisory Board for the American Association of Personal Trainers and is a Fellow of the National Board of Fitness Examiners. He oversees operations at his facilities; Spencer Escape Fitness Resort and Spencer Wellness Center, both located in California.

John was recently nominated for the California Community College Distinguished Alumni Award.

Each week, over one million people around the world enjoy a fitness program created by John Spencer Ellis

Kelli Calabrese, MS, CSCS

Kelli Calabrese, MS, CSCS is the 2007 Denton County Personal Trainer of the Year and 2004 Personal Trainer of the Year as voted by Personal Fitness Professional Magazine. Kelli is an international presenter, author, personal trainer, lifestyle coach, spokesperson, women’s fitness expert and 21 year wellness professional. Kelli is the Editor of Personal Fitness Professional and Wellness & Fitness Entrepreneur magazines. She is the Author of Feminine, Firm & Fit – Building A Lean Strong Body in 12 Weeks. She was the lead fitness expert for eDiets and eFitness from 2000 – 2003 and remains a guest columnist.

At the age of 22 Kelli had completed 3 Science degrees including an Associates in Biology, Bachelors with High Honors in Exercise Physiology and a Masters in Clinical Exercise Physiology and Cardiac Rehabilitation. Since 1986, Kelli has acquired 23 fitness, nutrition, weight management and lifestyle consulting certifications. For 14 years she co-owned and operated a chain of 4 fitness centers (Excellence in Exercise) and managed 4 corporate centers with clients such as Calvin Klein Cosmetics, Nabisco and Beneficial Insurance. In 1991 Calabrese opened Xercise Institute, the first school for preparing candidates for the American Council on Exercise’s Personal Training exams.

In 2000, Kelli began Calabrese Fitness Consulting LLC which focuses on reaching both trainers and consumers with her passion for fitness and wellness. She helps trainers grow prosperous careers through the, personal consultations, writing, editing, audio programs and at industry conferences. She reaches consumers through online training , phone coaching , magazines, TV, radio, audio programs , group training, books, Adventure Boot Camp , ipod workouts and live seminars.

She is on the advisory board for Purdue University, the Get America Fit Foundation, Exercise TV, Healthy Kids Catalog, The Body Mechanic, My Nutrition Store, Beauty & Lace and the Personal Trainer Business Association( www.PTBAonline.com ) Kelli ‘s clothing is sponsored by Persona and her skin care is sponsored by Motion Medica.

Kelli is the International Master Trainer for Adventure Boot Camp and prepares qualified candidates to become Adventure Boot Camp Coaches. Calabrese has been a spokesperson, consultant, advisor or expert for clients such as The American Council on Exercise, NESTA (National Exercise & Sports Training Association), the National Board of Fitness Examiners, Athletic Baby, The Aerobic & Fitness Association of America, National Board of Fitness Examiners, Smuckers, Kellogg, Glaxo Smith Klein, The Watermelon Council and Quaker Oats.

Kelli is available for spokesperson and media opportunities internationally, as well as personal training and grocery shopping tours on a limited basis in the Dallas area. Kelli ‘s personal mission is to empower individuals with the tools to make health, fitness and wellness a permanent and enjoyable part of their lives.

Mark Baines, BBA, CSCS, CPT received his degree in business management in 1993 from Gonzaga University where he also obtained secondary teaching certification in social studies. He currently holds certifications as a Certified Strength Conditioning Specialist (CSCS) through the NSCA and holds personal training certifications from the NASM, NESTA, ISSA, and NCCPT. He worked as a teacher, high school basketball coach, cross country and track coach for more than five years before working as a personal trainer and strength coach for the last five years. He taught social studies, English, math and computer applications for four years in Seattle, WA before moving to southern California to train for the 2000 Olympic Games in Sydney, Australia. Mark ran at the collegiate level at Gonzaga University, but his times fell short of the 2000 U.S. Olympic Trials. He still trains today in the 400 and 800m dash. He now trains independently with his business, One Way 2 Fitness, and works with athletes and non-athletes of all levels. He has been teaching personal training certification courses for the past two years and will continue to teach, coach and instruct in some capacity as long as he is able.

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