Meet the Trainers
At PNF your success is our success. As a business, we only succeed if you succeed. This relationship ensures a truly invested experience in your health and helping you reach your goals.
Owners Mark York and Whitney Sullivan have over 25 years of experience in the health & fitness field.
All trainers have a Bachelor Degree and over 10 years experience in the fitness industry. We are updated on all certification through continuing credited education. All trainers are updated on CPR/AED and First Aid.
Intern Trainers have the fitness and wellness knowledge that leads to the success of PNF. They may have a national certification and are presently working to gain more experience towards their career. All intern programs are overseen by our qualified trainers.
Each trainer brings their own unique style and skill set to help you reach your goals. Whether it’s specializing in post rehabilitation, youth training, nutrition or anything in between, PNF guarantees you are matched to the best trainer to ensure you achieve amazing results.
Whitney Sullivan: Owner/Trainer
Whitney graduated from University of Maine at Presque Isle with a B.S. in Recreation & Health in 1988. Whitney has been a group fitness instructor for over 25 years. Whitney has been an active member of the American Council of Exercise since 2002 & a professional certified personal trainer for 12+ years. Whitney currently is co-owner/trainer at PNF and lives in Windham with her husband and 3 children.
High School Sports, Field Hockey, (Honorable Mention & State Runner Up ) Basketball, Track and Field. College Field Hockey and Power Lifting. (NPC) National Physique Committee in Florida for Competitive Bodybuilding, placing 1st in Key West and 2nd in Fort Lauderdale. She completed in several Marathons and multiple competitive road races. Qualified 100th in the Boston Marathon and completed while 6 months pregnant. 25+ years experience instructing group exercise classes and spinning. Whitney enjoys running, Yoga, core training, mountain biking, spending time with her family and playing with her dogs.
Graduated from University of Maine at Presque Isle with a Bachelor of Science Degree in Recreation Leisure Services/Health. A member of ACE- American Council on Exercise and IDEA Health and Fitness Association since 2002. Certified Personal Trainer & Clinical Exercise Specialist. CPR and First Aid Certified. Certified Zumba and Pound Instructor.
Fitness is a simple concept that has been over complicated. Changing your body is a process of being able to positively balance a physical, mental, emotional and spiritual lifestyle which is accomplished overtime through CONSISTENT EFFORT.
Baby boomers, Women in Menopause, Brides to be, New Moms, senior fitness, bodybuilding, choreographing of competitive fitness routines, Marathon runners, flexibility, Pre. & Post Rehab.
"My mind tells me to win, my spirit shows me how and my body delivers"
Mark York: Owner/ Trainer
Mark started in the health field as a PCA (personal care attendant). While attending USM for his Health Fitness B.S. York got hired as the Asst. Fitness & Wellness Coordinator and was a personal trainer at a local fitness center. Mark also lectures academic classes for the Exercise Science department at USM. Mark currently is co-owner/elite trainer at PNF while living in Windham with his wife and two children.
Played Football & Baseball at Windham High School, Maine Shriner's Lobster Bowl 2001, Weight Lifting, Core Training, Cycling, Running, Tough Mudder Challenge, Adventure Triathlons
B.S. Health Fitness, Professional Member of NSCA, USM S & C Coach, USM EHSS Lecturer, PCA Certified, SS Certified, BBP Trained, CPR Certified
Strengthen the core first and then work the way out.
Baby Boomers, Pre/Post Rehab., Strength Training, Core Stability, Functional Mobility, New Moms & Bodybuilding
"Health is Wealth"
Fitness History: My passion for fitness began when I was 14 years old and I started working out at home using soup cans as weights. My love for fitness grew and I went on to earn my BS in Exercise Science from Springfield College. Years (and years) later it is still one of the most important anchors in my life and the only thing that keeps me grounded on most days. I have spent the past 15 years working in the disability insurance which enabled me to work and develop relationships with many people from many walks of life.
Credentials: BS Exercise Science, Springfield College; interned at St. Francis Hospital, Hartford Ct., interned at Western New England College, Springfield, Ma
Specialties: Woman’s fitness, Baby Boomers, Post Natal exercise
Philosophy: As a single mom with full custody of 2 kids I understand that time is a precious commodity and balance between family and outside interests can be tough. Fitness should be as fun as it is effective. Investing time in your fitness is also investing time in your health and wellbeing – as well as your sanity J. Start with figuring out your “WHY”. Why do you want to want to invest in yourself? Your answer could be either a pair of jeans, fat loss or getting an illness under control. It is important to understand that your “why” is a dynamic working document that will change while on your fitness journey – your workouts should be dynamic and ever changing as well. Everyone is on a different path to health and wellness and every one of those paths leads in the right direction.
Quote: Figure out your “WHY” and trust yourself to get there
Andrea has a degree in Community Health Education from University of Maine, Farmington and a personal trainer certification through W.I.T.S. She has continued her education at St. Joseph's college taking several courses in exercise physiology. Andrea has worked as a group instructor and personal trainer for the past two years.
Andrea played soccer, basketball and softball in high school and continues to be involved in sports both recreationally and through youth coaching. As a former middle school teacher she was an adult leader for Allagash Waterway canoeing trips for 7th and 8th graders and continues to enjoy hiking, kayaking, skiing and exploring the outdoors. Andrea enjoys a variety of fitness activities and is currently working toward her black belt in karate.
B.S. Community Health Education, W.I.T.S. certified personal trainer, CPR and AED certified
Circuits, womens health and general fitness
As with anything in life fitness is balance. A balanced approach that includes all aspects of health and fitness needs to be considered when designing a fitness plan. I like to focus on functional movement and the whole body when designing a workout. This type of training mimics everyday movements that involve multiple joints at the same time and it's easy to see the benefits in day to day activities. Health isn't just about physical fitness for me. I believe that through fitness people can gain self-confidence and happiness that carry over to life outside the gym.
Will it be easy? No. Will it be worth it? Absolutely.
Nicole has fifteen years of dance experience, including competitive dance, in all styles. She was a past dance instructor for a local studio. She also enjoys Pilates, yoga, core training, and leisurely outdoor activities.
B.S. in Health Sciences and a minor in Holistic and Integrative Health from the University of Southern Maine. Received a Certification in Gerontology. Courses in nutrition, physical fitness, and wellness. CPR, First Aid, and AED certified through the American Red Cross.
Geriatrics and flexibility
Fitness is a mental decision. You must first change your mind before you can change your body. Find balance, push yourself, never stop creating new goals, and enjoy what you do along the way.
"Work hard, be happy, be you."
Seth is currently a senior exercise science student at the University of Southern Maine. Seth is originally from Gardiner, ME and has had a passion for sports and fitness ever since he was young.
Growing up Seth was always involved with sports; he played football, ice hockey, and lacrosse. Seth continued playing those sports throughout high school and made the decision to pursue a collegiate athletic career playing Lacrosse at the University of Southern Maine. While in college Seth decided that choosing the fitness industry would be his best fit, because of his prior background and his love for helping people reach their goals!
BS in Exercise Science from the University of Southern Maine
Certified Strength and Conditioning Coach(CSCS)
“Control the weights, don’t let them control you”