Mon - Thu: 6:30 am - 8 pm • FRI: 6:30 AM - 3 pm • Sat: 8AM- 3PM & Sun: 8 am - 12pm 
All of the teachers are wonderful and experts in the field.
Lovely, helpful staff; judgment free zone!
It's a great, community-centric, body-positive place.
If there were 10 stars, mActivity would get them!
The teachers are great at teaching a variety of classes that include cardio, barre, stretching and yoga.
Beautiful setting, variety of equipment, expertise of professional staff of trainers. Everyone has a place here, athletes, seniors, etc.
Great selection of group classes (barre, HIIT, etc), good vibe at the gym overall!
mActivity creates such a positive environment that I absolutely look forward to working out, and I go multiple times a week now.
There are so many things I love about mActivity; first and foremost, it's the first gym I've ever attended consistently!
There is a happy feeling that I get when coming into mActivity... I couldn't ask for more in a gym or community of this sort!!


mactivity gym center
mActivity is a community hub for your physical, social and emotional well-being.
mActivity promises to guide you in starting, renewing or refining your physical activity programs in order to reach your optimum wellness by offering safe, science-backed programs backed by systematic, clinically proven strategies assisted by personal trainers, yoga instructors and stretching specialist with decades of experience.
A community to help you live your most extraordinary life.
People Love mActivity


Our Team

Marilys Robles

Burch Valldejuli

Marilys's motto was always "When she was younger, exercise to her was about physically looking fit. As she evolved more in to fitness, it became more than just physical, it's about being emotionally in tune with your mental state of mind".

Marilys moved with her daughter to Connecticut in 2017 from San Juan, PR. Coming from a long career in the arts from starting in a gallery in Los Angeles, CA from having her own business in PR for over 20 years she decided to join the family business alongside with her cousin Burch, the co-founder of mActivity Fitness in New Haven.

She has always been in to fitness, dabbling in weight training, paddle boarding and rollerblading. Her love for the arts and fitness was a perfect combination to open a franchise since mActivity also has an art gallery and promotes the importance of being part of the community.

Marilys received a degree in Business Administrative with a concentration in Marketing from The Phoenix University.

Degree in Business Administration, The Phoenix University

Desireé Tinsley

Pablo Perez

"You should never put a price tag on your health". "When it comes to wellness, there are no limitations on what you can do". That is Desireé's motto when it comes to health and wellness.

Born and raised in New York, Desireé has had a love for fitness since H.S. when she first developed her love for running. Over the years she has participated in countless marathons in New York's central park which has helped mold her love and passion for everything fitness. She began her fitness journey in Stamford in 2001 working in a gym that gave her the drive and compassion to help others realize the importance of health and fitness.

She is committed to sharing her knowledge, experience and enthusiasm about fitness while helping to build a strong community that will encourage people to develop a healthy lifestyle.

Desireé studied Business Administrative with a minor in Marketing while working full time in the Reinsurance industry as well as working in the fitness industry.

Bachelor's Degree in Business Administration from the University of Arizona Global Campus.

News & events

mActivity has a host of activities and events each month at our location. We keep you updated on the website as well as send our members special invites to previews and other events.

mActivity is closed for deep cleaning and sanitizing from Mon-Thu 1 PM to 3 PM


5 star


Awards Won

150 Washington Blvd, Stamford

06:30 AM - 8:00 PM

06:30 AM - 8:00 PM
06:30 AM - 8:00 PM
06:30 AM - 8:00 PM
06:30 AM - 3:00 PM
08:00 AM - 3:00 PM
08:00 AM - 12:00 PM
Check Holiday Hours
New Year’s Day: 7 am – 12 noon
MLK Birthday:  Regular hours
Washington’s Birthday: Regular hours
Memorial Day: 7 am – 12 noon
Independence Day: 7 am -12 noon
Labor Day: 7 am – 12 noon
Columbus Day:  Regular hours
Veteran’s Day:  Regular hours
Thanksgiving Day: 7 am – 12 noon
Xmas Eve / New Year's Eve: 6 am - 6 pm
Christmas Day: CLOSED
Check Regular Hours