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Instructors

learn about your favorite NAC instructors

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  • C. J. DeMatteo

    C. J. DeMatteo

    Contact C.J.



    • [email protected]

    • 413-519-3707

  • Beth Rossi

    Beth Rossi

    Who would have guessed that when I began teaching aerobics in 1988 at a tiny gym called Northampton Nautilus, now Northampton Athletic Club, located in the back half of a motorcycle shop, it would still be my calling and passion 33 years later!  I currently teach an Aqua and a Pilates Fusion class at Hampshire

    Who would have guessed that when I began teaching aerobics in 1988 at a tiny gym called Northampton Nautilus, now Northampton Athletic Club, located in the back half of a motorcycle shop, it would still be my calling and passion 33 years later!  I currently teach an Aqua and a Pilates Fusion class at Hampshire Athletic Club and a Step Class at Northampton Athletic Club.  I still thrive on the reciprocal energy from both new and longtime participants.  I hope folks always feel free to approach me with questions regarding their health and fitness!

    Sue Yarworth

  • Kara Syer

    Kara Syer

  • Emma Ludovico

    Emma Ludovico

    Emma found her deep passion for movement and training at an early age. She trained as a competitive figure skater beginning at the age of 8, going on to compete and perform at several events throughout New England. She coached skaters ranging from young children to adults through the USFSA Basic Skills Program, also judging

    Emma found her deep passion for movement and training at an early age. She trained as a competitive figure skater beginning at the age of 8, going on to compete and perform at several events throughout New England. She coached skaters ranging from young children to adults through the USFSA Basic Skills Program, also judging and monitoring local competitions and test sessions.
    Throughout her years of training, Emma’s love for understanding, challenging, testing, and pushing the human body evolved past skating. Following her competitive career, she shifted her focus to lifting and training within a gym setting. She fell in love with it, finding the same focus, drive and energy as with her skating. Emma then became certified as a personal trainer with a specialization in fitness nutrition through the American Council on Exercise. Her love of teaching and yearn to pass on this passion for movement, have landed her where she is today. A personal trainer at HAC, ready to get you moving! Ready to elevate your focus, your strength, your mindset.
  • Mary Mason

    Mary Mason

    Mary has always held an interest for mind, body, and spiritual wellness. After receiving her Bachelor’s degree in Psychology from Salve Regina University, she gained a particular interest in the unique connection of the mind and body, and decided to pursue her career in fitness. She has had 10+ years of experience in professional and pre-professional dance training

    Mary has always held an interest for mind, body, and spiritual wellness. After receiving her Bachelor’s degree in Psychology from Salve Regina University, she gained a particular interest in the unique connection of the mind and body, and decided to pursue her career in fitness. She has had 10+ years of experience in professional and pre-professional dance training and continues to implement this passion into her career as a fitness professional.
    With structured choreography and high energy dance routines, Mary is able to provide her clients with fun, exciting, and engaging workouts.
    Now, Mary teaches group fitness classes like HIIT & Strength at The Hampshire Athletic Club, while also working part-time at the front desk.
    She is pursuing her career as a Personal Trainer through a certification with the American Council on Exercise and hopes to begin training at the club in the near future.

    Ana Devlin-Gauthier

  • Jenn Therk

    Jenn Therk

    Jenn Therk started teaching indoor cycling in 2017 and has been an enthusiastic participant for many years. She enjoys the camaraderie of a group workout and loves to get lost in a good playlist. She strives to make her classes fun, safe, and effective. She is also a competitive jump roper with Pioneer Valley Jump

    Jenn Therk started teaching indoor cycling in 2017 and has been an enthusiastic participant for many years. She enjoys the camaraderie of a group workout and loves to get lost in a good playlist. She strives to make her classes fun, safe, and effective. She is also a competitive jump roper with Pioneer Valley Jump Rope. In 2019, she was awarded 3rd Place All-Around in the Over 30 Division at USA Jump Rope Nationals.

    Contact: [email protected] on Instagram or email [email protected]

    Sarah Blackmore

    Darkeith Lofton

    Kara Syer/Darkeith Lofton

  • Maria Kovalenko

    Maria Kovalenko

    Yoga has always been present in my life in one way or another. I quit classes several times, but I always returned to yoga again and again. After 5 years of in-depth Kundalini yoga classes (if you see strange people wearing white clothes, in yoga clubs, this is kundalini: yoga with a deep approach to

    Yoga has always been present in my life in one way or another. I quit classes several times, but I always returned to yoga again and again. After 5 years of in-depth Kundalini yoga classes (if you see strange people wearing white clothes, in yoga clubs, this is kundalini: yoga with a deep approach to breathing, meditation, mindfulness), I returned to traditional yoga, graduated from Moscow Yoga University, additionally took courses on safety in yoga, biodynamics of movement, dynamic stretching. It is important for me to teach effectively and safely. I have always led yoga groups for friends. Through teaching yoga, I like to give people health, inner balance and freedom of movement. Our body can do more than we think.

  • Kali Torr

    Kali Torr

    Kali first entered the world of Yoga at the age of 12, attending classes with her mom at their local gym. The practice of fun stretching slowly evolved into a deeper settling, settling into herself. Kali’s personal practice has now blossomed into a vital ritual in her life, providing peace and clarity through intuitive movement..

    Kali first entered the world of Yoga at the age of 12, attending classes with her mom at their local gym. The practice of fun stretching slowly evolved into a deeper settling, settling into herself. Kali’s personal practice has now blossomed into a vital ritual in her life, providing peace and clarity through intuitive movement..

    Kali leads her classes with the utmost reverence to an individual’s needs and body. To her, the language of yoga is the language of The Self. The flow of class will honor the body, challenge the mind and always include some form of breathwork, intention setting and grounding. Kali studied to become a certified Yoga Instructor in the Sacred Valley of Peru in the Spring of 2022. She is thrilled to be teaching in Amherst and to the incredible community that thrives in this equally sacred valley.

  • Kendra Carney

    Kendra Carney

  • Donna Kelley

    Donna Kelley

    "Try something new every once in a while; change your routine so you stay inspired and work your muscles (and heart!) in new ways."

    Health and Fitness has been a lifelong passion for me. After I graduated with my undergrad degree, I started competing in sport karate tournaments; a year later I held the number one ranking in women’s black belt fighting for the New England region. Soon after that I started teaching aerobic exercise at Northampton Nautilus (predecessor of NAC). It’s really great to be working with Perry and Scott again, teaching at HAC. I teach kickboxing on Tuesdays, where I focus on developing cardiovascular endurance, strength, balance, coordination, and flexibility through basic kick and punch combinations, along with weight work. I also teach intervals on Saturday mornings, where I alternate weight work with various cardio sets. My day job is at Babson College, where I’m an entrepreneurship professor. But my fun job is at HAC where I get to spend time with a group of enthusiastic and dedicated people that come to work out with smiles, laughter and encouragement for others.



    Education/Certifications



    • Ph.D., Management, Rensselaer Polytechnic Institute.

    • MBA, UMass.

    • BA in Chemistry, MA College of Liberal Arts.

    • Currently certified by AFAA.

    • Also held longtime certifications from ACSM and ACE.




    Other Interests



    • Horseback riding, mountain biking, skiing, doing fun stuff with my daughters Kira and Jada and dog Jake.



  • Heidi Peltier

    Heidi Peltier

    "If you enjoy what you're doing, it's not work. Fitness is fun when you try new things, push yourself to new levels, and have plenty of variety in your workouts. Then staying fit becomes its own reward."

    Heidi is an economist by day but changes gears in the spinning room. Her love of
    fitness, music, and people align when she’s leading a ride and helping others push
    themselves. Heidi lives in Amherst with her partner and three young sons.



    Education/Certifications



    • Certified Spinning Instructor (since June 2014)

    • C.P.R./A.E.D. Certified




    Other Interests



    • Heidi is an avid tennis player, enjoys hiking, biking, jogging, and chasing her boys around the yard. She has lived in 3 other countries but is happy to call Amherst her home.





    Contact Heidi



    • [email protected]



  • Diana Peters-Ross

    Diana Peters-Ross

    Diana began practicing yoga 25 years ago in an effort to alleviate back pain. She found it beneficial in so many other ways including feeling more balanced in body and mind. After 15 years of personal yoga practice, and studying with a variety of teachers, she decided to share her love of yoga with others.

    Diana began practicing yoga 25 years ago in an effort to alleviate back pain. She found it beneficial in so many other ways including feeling more balanced in body and mind. After 15 years of personal yoga practice, and studying with a variety of teachers, she decided to share her love of yoga with others. In 2002 Diana completed Yoga Teacher Training at Kripalu Center for Yoga and Health. Since then, she has taught yoga classes at Holyoke Hospital and prenatal yoga at Cooley Dickinson Hospital. In 2004, Diana began teaching yoga at HAC where she very much enjoys the friendly, non-competitive atmosphere, and creating community through yoga.



    Education/Certifications



    • Kripalu Yoga Teacher Certification

    • Yoga Dance Teacher Certification

    • Prenatal yoga Teacher Certification

    • M.Ed.




    Other Interests



    • Diana lives with her husband, two sons and dog, “Odie”.

    • She enjoys swimming and hiking.

    • Diana works as a Reading Specialist in the public schools.



  • Ahna Sadowski

    Ahna Sadowski

    "Ahna's goal for each class is that it is fun, safe, and effective!"

    Ahna has been teaching a variety of group fitness classes in the Pioneer Valley for over a decade. Ahna fell in love with group fitness while attending Syracuse University where she completed Masters’ Degrees in Communication and Education. Her fitness interests are diverse and include everything from intense interval training, body sculpting, and step, to exploring the art of Argentine Tango and other dances. Ahna loves to move and loves to motivate others to do the same!



    Education/Certifications



    • Ahna holds certifications in AFAA Group Exercise, LesMills BodyStep™, Zumba Fitness®, and is CPR/AED certified.

    • Ahna attends many continuing education workshops and trainings each year to ensure participants get the most out of their workout.




    Other Interests



    • By day, Ahna works full-time as a Program Manager at the Evaluation Systems group of Pearson. Ahna enjoys hiking and spending time with her husband and their two two dogs; Martini and Bailey.



  • Celeste Sze

    Celeste Sze

    “I’ve been in the fitness industry since 1983. I’ve lived a lifetime of fitness and continue to pursue constant education to keep up with the ever-changing information in the fitness, massage and spa world. As your trainer, I can design a nutrition and exercise program allowing you to reach your ideal lean to fat ratio. When your muscles are fatigued I can massage you or help to rejuvenate your skin with a facial or spa treatment.”

    Education/Certifications



    • I have countless certifications. I’ve kept my certifications and licenses current since my entry in to the fitness world in 1983. I have a degree in painting and art history and 49 pre med credits from the University of Massachusetts.

    Other Interests



    • I exercise, paint, travel and eat well. I have a healthy and happy life and enjoy inspiring my clients to enjoy all life has to offer.

    Contact Celeste



    • [email protected]

    • (413)695-3020

  • Stacy Simonson

    Stacy Simonson

  • C. J. DeMatteo

    C. J. DeMatteo

  • Beth Rossi

    Beth Rossi

  • Sue Yarworth

  • Kara Syer

    Kara Syer

  • Emma Ludovico

    Emma Ludovico

  • Mary Mason

    Mary Mason

  • Ana Devlin-Gauthier

  • Jenn Therk

    Jenn Therk

  • Sarah Blackmore

  • Darkeith Lofton

  • Kara Syer/Darkeith Lofton

  • Maria Kovalenko

    Maria Kovalenko

  • Kali Torr

    Kali Torr

  • Kendra Carney

    Kendra Carney

  • Donna Kelley

    Donna Kelley

  • Heidi Peltier

    Heidi Peltier

  • Diana Peters-Ross

    Diana Peters-Ross

  • Ahna Sadowski

    Ahna Sadowski

  • Celeste Sze

    Celeste Sze

  • Stacy Simonson

    Stacy Simonson

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Contact Info

  • 90 Gatehouse Road
    413 256-6446 phone
  • Amherst, MA 01002
    413 256-8327 fax
  • United States
    [email protected]

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  • Family Swim & Lifeguard hours Tues/Thurs, 4:30-6:00PM

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