Mon - Fri: 5 am - 9 pm • Sat - Sun: 7 am - 6 pm 


Meet Our Team of




Fitness Director
“I started my journey to fitness at the age of 12 practicing Martial Arts and gymnastics and competing in my first national Karate tournament at the age of 13 and becoming a Karate instructor at the age of 15.”
Born in Chile, Sergio immigrated to the USA to attend college. Sergio has worked as a personal trainer for 13 years. His National Academy of Sports Medicine (NASM) Certifications include: Master Elite Certified Personal Trainer, Fitness Nutrition Specialist, Neuromuscular Stretching, and Optimal Performance Training for Seniors, Youth and Prenatal Clients. His other certifications include: FMS Functional Movement Screen, DeFranco “CPPS” Certified Physical Preparation Specialist, Activated Isolated Stretching: The Mattes Method, Erick Dalton Myoskeletal Alignment Techniques, and TRX Suspension Training. While living in California Sergio was an avid athlete, he passionately practiced martial arts and enjoyed outdoor activities such as mountain biking, rock climbing and rollerblading. He has devoted his life to fitness. He is also bi-lingual English and Spanish.
National Karate Champion, Chile Trained with the Head Coach of the USA Olympic Tae Kwon Do Team B.A. University of California, Davis: Psychology & Communications



Personal Trainer
“Eat healthy, stay active, & enjoy life.”
Catherine’s passion for sports and exercise inspired her to pursue an education in the health and fitness field. As a Certified Personal Trainer her motivational skill and enthusiasm allows her clients to achieve their fitness goals with speed and ease. She helps them focus on creating and maintaining a healthy lifestyle with the perfect balance of diet and exercise.
NASM Certified Certified Personal Trainer Corrective Exercise Specialist Specializations: Fitness Nutrition, Weight Loss, Senior Fitness Instructor/Trainer of TRX Suspension, Sandbag Functional Training, Silversneaker, and Synergy 360′



Personal Trainer
“I truly love what I do!!!”
Sports have always been a part of Carolino’s life. Whether it was playing soccer at 5 years old or playing flag football at 30, he always had a love for athletics. At the age of 10, Carolino played in the Pop Warner Super Bowl and, later in his college years, played Basketball for Norwalk Community College. Today, in his 30s, he still plays in numerous adult leagues, including flag-football, softball, and basketball. He sees health and fitness as a lifestyle and, now as a proud father, he wants to be in the best shape of his life not only for himself but also for his kids. After years of being behind a computer all day when he was in the corporate world, he decided to become a fitness professional dealing with real people and real life issues. He says it’s the best move he ever made in his career. Carolino’s main objective is to help his clients reach their goals and make fitness a lifestyle!
ACE Certified NCAA Student Athlete



Personal Trainer
"Fitness is not a destination, it is a way of life"
Tyler has over 20 years experience in the health and wellness industry in the New Haven area. He was the owner of New Haven Fitness for 10-years. He has great passion for personal training working with clients ranging from Olympic athletes, octogenarians, to people with physical limitations.
RTS – Resistance Training Specialist



Personal Trainer
“Strength doesn’t come from what you can do, it comes from overcoming the things you once thought you couldn’t do.”
Kevin has been a National Academy of Sports Medicine (NASM) Certified Personal Trainer for the last nine years. He has an extensive background in designing programs for clients in pre- and post-rehabilitation programs, general strength/cardio conditioning, body fat reduction, and hypertrophy training exercise programs. Kevin has worked with a wide range of clients from the youth to the elderly, from adaptive sports disabled athletes to individuals with chronic diseases and injuries. He also has experience in teaching exercise boot camps for individuals of all fitness levels. Kevin is a big believer that exercise should be fun, and not just a daily requirement in one’s life. He believes there is no “one size fits all exercise program,” but there is an exercise program that can be customized for any individual to achieve his/her exercise goals regardless of his/her current fitness level.
NASM Certified Personal Trainer NASM Corrective Exercise Specialist NASM Golf Fitness Specialist NASM Youth Fitness Specialist B.S. Southern Connecticut State University



Personal Trainer
“I always challenge myself to achieve my goals and will help you achieve yours too. “
Dave is a National Academy of Sports Medicine (NASM) Certified Personal Trainer, Functional Movement Systems Level 1 trainer, and TRX instructor with over 25 years of experience. He has worked with everyone from children to the elderly, nationally ranked athletes to armchair quarterbacks, those trying to lose weight to those trying to bulk up. All have benefited from his depth of knowledge, gentle encouragement and high energy level. Dave has participated in sports his whole life including 12 years of competitive swimming, 3 years of track & field and 2 years of USCF cycling. He has also participated in triathlons more recently, Dave has taken up racing marathons. As a competitive athlete, Dave has placed top 3 in several races in the last few years.
B.S. Human Performance, Southern Connecticut State University, concentration in Nutrition



Personal Trainer
"You can do anything you put your mind to."
John has worked as a Personal Trainer and Strength & Conditioning Coach for over 20 years. He spent most of his career working in major markets, such as NYC and Miami. He has competed for over 25 years in the sport of Powerlifting and holds 12 state records and 2 world records in the Deadlift. He holds a B.S. degree from Southern Connecticut State University. John is also an Original Member of the National High School Strength & Conditioning Association.
B.S. Southern Connecticut State University ACSM Certified Exercise Physiologist



Group Fitness Instructor
Liz started Spinning almost 20 years ago and began teaching in 2005. She expanded her knowledge of group fitness and added AFAA certifications in BOSU, Pilates, Senior fitness, and indoor cycling; Reebok indoor cycling; and an AFTA personal training certification. She became very interested in nutrition’s role in her own health, and returned to school to complete a degree in Nutrition (in addition to a B.S. and M.S. in Communications). Liz also achieved her goal of competing in a fitness competition before her 30th birthday — and then a couple more times in her thirties. When Liz isn’t Spinning, she’s lifting. When Liz isn’t at the gym, she enjoys spending time with her dog, volunteering for Bully Breed Rescue and Ruff n’ Scratchy, traveling anywhere warm, and adding to her collection of (way too many) shoes.



Group Fitness Instructor
Andrea believes strongly in a practice that is healthy for the body, with an emphasis on correct alignment. Her goal is to have students get to know themselves better through their yoga practice, and to find joy in movement and building strength. Andrea believes that when we feel strong in our bodies, we can find strength in other areas of our lives. Andrea is certified through Fresh Yoga and is certified to teach yoga to children. She volunteers at Yale-New Haven Hospital where she teaches yoga to children and their caregivers in the Pediatric Oncology Department. Andrea also holds a B.F.A. in studio art, and her background in the fine arts and love of creativity comes across in her use of sequencing.



Group Fitness Instructor
Emily began taking barre classes as a complement to intense cardio workouts. Noticing changes in both her body and mind, she found herself attending classes almost every day of the week. Wanting to share her passion with others, she completed her barre teacher training at Barre & Soul in Cambridge, MA. Her classes are focused on building strength and flexibility – and having fun! She is a Ph.D. student at Yale and holds a B.A. from Cornell University.



Group Fitness Instructor
Jen is a movement educator and anatomy geek. She has been working in the field of fitness and self-care for about 12 years. She is a certified Yoga and Yoga Tune Up® Instructor, Personal Trainer and Massage Therapist. Jen combines all those modalities in her classes in order to teach her clients how to move better and live better in their bodies. Jen also holds a BA in Interior Design, BS in Business and believes that she is never too old to start a new career, new endeavor or adventure.


Del Valle

Group Fitness Instructor
Mario strives to ensure that no one ever feels out of place and can easily achieve his or her dreams with determination, hard work, and a little sweat. He is not just a Spinning Instructor and a Trainer; he is a mentor and motivator. Nothing gives him more satisfaction than knowing his class participants have succeeded and striving to deliver the best service in this industry. Mario is CPR/Medic First Certified and holds certifications in multiple areas of fitness including AAAI/ISMA Master Personal Trainer, Wellness Coach, Kids & Teens Instructor, Reactive and Keiser Indoor Cycling. He is happily married to his wife Angelica, with whom he is blessed to share his love of life, health, and fitness. He is a Father of 9 kids and a Grandfather of 24 and a Great Grandfather of 3.



Group Fitness Instructor
Amy, co-founder of Pilates Haven, loves sharing her enthusiasm for Pilates. Amy completed the original Pilates certification program, Romana’s Pilates, where she learned the authentic method as Joseph Pilates taught to his protege, Romana Kryzanowska. After completing the 800-hour certification, Amy also became certified as a pre and post natal Pilates specialist through the Center For Women’s Fitness. Amy brings her knowledge from a decade of research on the work of Joseph Pilates to her teaching, and she has been honored to teach Pilates workshops internationally. Outside of the Pilates studio, Amy loves to travel, paint, write, garden, ski, and play with Winston (the Pilates pup). About Pilates Haven: Amy and John are proud to bring authentic Pilates to New Haven! Pilates Haven is New Haven’s most fully-equipped studio, featuring top-of-the-line Gratz equipment. The combination of resistance and support of the reformers, Cadillacs, chairs, and barrels brings the most out of each exercise. Done the way Joseph Pilates intended, the Pilates Method works wonders, building strength and flexibility throughout the body.



Group Fitness Instructor
Stephanie originally came to yoga for an expressive outlet. But, she stayed for its physical calming effects on her own life. After practicing yoga for seven years, she received her 200-RYT from The Breathing Room in New Haven where she learned the virtues of form and flow. Stephanie is both lighthearted and passionate and leads classes that always encourage growth in both mind and body.



Group Fitness Instructor
Kyle is a young, energetic, driven and passionate AFAA Group Exercise Certified Instructor originally from Long Island, NY and now living in Middletown, CT. Kyle has spent the past 6+ years teaching a variety of fitness classes including Zumba®, Zumba® Step, Zumba® Toning, BollyX® and STRONG by Zumba ™. He became licensed to teach Zumba® in February 2011 and since training has developed a burning passion for the program as well as dance fitness. He currently acts as the Dance Fitness Team Lead at Wicked Z Dance & Fitness in Rocky Hill, CT. Kyle holds the following licenses/certifications: Zumba® Basics 1 & 2, Zumba® Toning, Zumba® Step 1 & 2, STRONG by Zumba ™, Plate by Zumba™ and ARC First Aid/CPR/AED. Kyle also practices as the Pediatric Renal Dietitian for the Center for Kidney & Bladder Disorders at Connecticut Children’s Medical Center.



Group Fitness Instructor
Andrew has been a certified SPIN/ Studio Cycle instructor. He is an avid road and mountain cyclist and incorporates many of these techniques and experiences into his class formats. He has been leading classes since 1996. He currently leads 15 classes per week. Andrew is an avid Road and Mountain cyclist. He also co-leads and marshals numerous outdoor group rides throughout the year.



Group Fitness Instructor
John, co-founder of Pilates Haven, is passionate about Authentic Pilates! John completed the original 800-hour Pilates certification program, Romana’s Pilates, where he learned the authentic method as Joseph Pilates intended. A former hockey player, John is known for his dynamic flow when he teaches. John’s clients vary from professional dancers & athletes to regular people just trying to get back in shape. Outside of the studio John enjoys the occasional glass of wine and having fun with friends! Catch his class every Tuesday @ 6pm or book directly for one on one sessions! About Pilates Haven: Amy and John are proud to bring authentic Pilates to New Haven! Pilates Haven is New Haven’s most fully-equipped studio, featuring top-of-the-line Gratz equipment. The combination of resistance and support of the reformers, Cadillacs, chairs, and barrels brings the most out of each exercise. Done the way Joseph Pilates intended, the Pilates Method works wonders, building strength and flexibility throughout the body.



Group Fitness Instructor
Born in South Africa, Amanda arrived in CT in 1998, where thanks to the encouragement the Group Fitness Director at Bally Total Fitness, she became certified to teach Group Fitness. Amanda eventually took on the Director position herself along with the challenge of running the program for Bally Total Fitness in Hamden and Stratford. In 2007, she and Sally opened their own Studio in New Haven where they taught Group Fitness and Pilates Reformer Classes. At present, Amanda owns her own Pilates Reformer Studio and is thrilled to be teaching Group Fitness at mActivity. She loves being part of the Fitness Journey of mActivity Members!



Group Fitness Instructor
Scott has been in the fitness industry for nearly thirty years, teaching in a variety of health club, university, and community settings. He started taking “aerobics” in college in the late 80s for gym credit and developed a passion for group exercise. Today, he holds multiple certifications from MOSSA and currently conducts exercise classes in formats including step training, resistance training, and yoga.



Group Fitness Instructor
Laura is a trained classical pianist and an ACE certified group fitness instructor. She works both as faculty at Neighborhood Music School (NMS) in New Haven and as a freelance artist. At NMS she is administrator and an instructor of the Dancing with Parkinson’s program. Laura is avidly interested in the connection between music and movement as it relates to health of mind and body. With a background in dance and extensive experience in the fitness industry, she has trained and taught in numerous formats. In her musical pursuits, she strives to develop a healthy, tension-free approach to allow successful, enjoyable music-making for a lifetime. In her fitness/dance pursuits, she is dedicated to helping people discover the thrill of good health through movement that is safe, effective, creative, and fun.



Group Fitness Instructor
Shana is the founder of FitStyle by Shana, a fitness approach that helps you find time for fitness where you didn’t think it existed. With nearly a decade in the fitness industry, she is passionate about sharing the tips and insights she has learned along the way to help anyone who struggles to find the time for exercise. As a fitness expert, Shana has been featured in national magazines, websites and fitness blogs and is seen regularly on WTNH News 8. She is an AFAA certified group fitness instructor and is licensed to teach Zumba, Zumba Gold, Aqua Zumba, and Pound. Shana holds a B.A. from Yale University. She’s known for doing leg lifts in line at Starbucks and working on her abs while getting a mani pedi.



Group Fitness Instructor
Emma began practicing yoga as a means to cope with the stress of graduate school. She found the physical challenge of yoga to be a welcome distraction from long hours of studying and collecting data in the chemistry lab. Having been a dancer all her life, she discovered that this “distraction” was, in fact, a passion for movement that she had held her entire life. This discovery led her to quit school and chemistry altogether to begin performing and teaching dance again, as well as becoming a certified Pilates and Yoga instructor. She now has a new career teaching dance, Pilates, Yoga, and Animal Flow, and loves to find creative ways to blend these methods. She has not set foot in a laboratory since and has never been happier.



Group Fitness Instructor
Natalie has been teaching group fitness classes for over 25 years and truly believes that exercise can and should be fun. She currently teaches for various companies/studios and works for ConnectiCare as an Exercise Physiologist/Wellness Trainer. She has also been an adjunct professor at Central Connecticut State University teaching in the Exercise Science/Human Performance Department. Natalie owns her own business called Joyful Movement and has filmed two of her own exercise videos. She also appeared in five exercise videos with fitness expert Ellen Barrett. Natalie has an Associates of Science Degree from Briarwood College, a Bachelor of Science Degree in Education and a Master of Science Degree in Human Performance/Exercise Physiology with a concentration in Nutrition from Southern Connecticut State University.



Group Fitness Instructor
In 1996 Lisa started her fitness journey at a local gym and was hooked right away. While taking group fitness for three years, she was approached by one of the instructors telling her that she has what it takes to become an instructor. Four years later, she decided to start the journey to become a group fitness instructor. Over the years, Lisa has received multiple certifications and worked at local gyms. She has taught Step, Kickboxing, Boot camp, Strength, Indoor cycling, Body Pump, Zumba, Zumba Gold, Seniors & Silver Sneakers. She enjoys motivating, encouraging large groups, small groups, and individuals and helping them make fitness a part of their lives.

Our Founders


Burch Valldejuli

“Imagine an inviting space to steward and enrich your physical health…That’s mActivity”

Born and raised in greater New Haven, Burch comes to mActivity from a 30+ year career in research and research administration, most recently as the Director of Program Development at the Yale School of Public Health. She is committed to improving both individual and community health. She is an avid cyclist and loves hiking and paddling with her family in the woods of Upper Peninsula Michigan.

Hopkins School, New Haven CT
B.A. Psychology and Women’s Studies, Goucher College
Ed.M. Counseling and Consulting Psychology, Harvard Graduate School of Education


Pablo Perez

“My passion is to deliver an exceptional experience for our members.”

Pablo lives in New Haven with his wife and daughter. He comes to mActivity with 10 years’ experience in the fitness industry as the owner of Core Fitness. His background also includes working in sales for Aetna, IKON office solutions, and as a paraprofessional for Urban Youth Elementary in New Haven. He earned a Business Degree at the University of Connecticut where he was an All-American rugby player. He spent years playing for teams in San Diego, New York, New Zealand and New Haven.

Notre Dame HS, West Haven
University of Connecticut, Business