MON – FRI: 6 AM – 9 PM  •  SAT – SUN: 7 AM – 7 PM 285 Nicoll Street, New Haven, CT 06511    203-936-9446
People

Meet Our Team of Professionals

Certified trainers and instructors who know your name, know your goals, and are here to help you improve the quality of your life through exercise and community.

One-on-One

Personal Trainers

Sergio Muñoz, Fitness Director at mActivity

Sergio Muñoz

Fitness Director

NASM Master Elite Personal Trainer and lifelong martial artist — national karate champion, FMS, TRX and corrective-exercise certified.

Catherine Walsh, Personal Trainer at mActivity

Catherine Walsh

Personal Trainer

NASM certified with specializations in fitness nutrition and weight loss; TRX, sandbag and Synrgy360 instructor.

Lindsay Hiebert, Personal Trainer at mActivity

Lindsay Hiebert

Personal Trainer

B.S. in Kinesiology, NASM CPT and Corrective Exercise Specialist — competitive powerlifter who blends strength training with yoga and pilates.

Andrew Fisher, Personal Trainer at mActivity

Andrew Fisher

Personal Trainer

30+ years in health and fitness — ACE certified in personal training, medical exercise and health coaching, with a rehab background.

Kevin Kim, Personal Trainer at mActivity

Kevin Kim

Personal Trainer

B.S. in Kinesiology with a decade of experience across Olympic weightlifting, powerlifting, injury prevention and rehabilitation.

Kevin Mangini, Personal Trainer at mActivity

Kevin Mangini

Personal Trainer

NASM certified trainer specializing in pre/post-rehabilitation programs, strength and cardio conditioning, and hypertrophy training.

Erica, Personal Trainer at mActivity

Erica

Personal Trainer

IFPA certified trainer and spin instructor with a Masters in Social Work — proof it's never too late to reinvent yourself.

In the Studio

Group Fitness Instructors

Sarah, group fitness instructor at mActivity

Sarah

Group Fitness & Cycling

20+ years of teaching — AFAA certified, Les Mills BodyPump, Keiser/Schwinn cycle, Barre Above and Mat Pilates.

Alyssa, yoga instructor at mActivity

Alyssa

Yoga

500-hour Registered Yoga Teacher with yoga therapy training — an invitational, supportive style that makes practice accessible.

Vanessa, yoga instructor at mActivity

Vanessa

Yoga

New Haven native with 20+ years of practice and 800+ training hours — teaches Hatha and Yin with mantra and breath work.

Erin, group fitness instructor at mActivity

Erin

Strength & Step

Certified Les Mills Body Pump and Body Attack instructor and former dancer teaching high-energy strength and step formats.

Heather, yoga instructor at mActivity

Heather

Yoga

500-hour Yoga Alliance certified with 20+ years of experience — powerful vinyasas taught with breath awareness and mindfulness.

Pauli, yoga instructor at mActivity

Pauli

Yoga

20+ years of coaching and teaching — 500-hour RYT whose classes emphasize kindness, acceptance and compassion.

Liz, cycling instructor at mActivity

Liz

Indoor Cycling

Spinning enthusiast teaching since 2005 — AFAA certified in BOSU, Pilates and indoor cycling, and a marathon runner.

Latoya, group fitness instructor at mActivity

Latoya

Strength, Barre & Zumba

21 years of group fitness teaching — circuit, bootcamp, barre, pilates and Zumba, delivered with energetic enthusiasm.

Andrea, yoga instructor at mActivity

Andrea

Yoga

Fresh Yoga certified with a strong emphasis on body-healthy practice and correct alignment — creative sequencing, joyful movement.

Mario, cycling instructor at mActivity

Mario

Cycling & Turf

AAAI/ISMA Master Personal Trainer, wellness coach and Keiser indoor cycling instructor — mentor, motivator, and proud grandfather of 24.

Alexzander, group fitness instructor at mActivity

Alexzander

Group Fitness

NASM CPT specializing in women's fitness — accomplished marathon runner who once ran the 200-mile Yale-to-Harvard Ragnar.

Laura, dance fitness instructor at mActivity

Laura

Dance Fitness

Classically trained pianist and ACE certified instructor exploring the connection between music, movement and health.

Lisa, group fitness instructor at mActivity

Lisa

Strength & Cycling

Teaching since 2000 — step, kickboxing, bootcamp, strength, indoor cycling, Body Pump and Zumba.

Leadership

Our Founders

Burch Valldejuli, co-founder of mActivity

Burch Valldejuli

Co-Founder

Greater New Haven native with a 30+ year research career, most recently at the Yale School of Public Health — committed to individual and community health. "Imagine an inviting space to steward and enrich your physical well-being."

Pablo Perez, co-founder of mActivity

Pablo Perez

Co-Founder

New Haven resident, UConn business graduate and All-American rugby player with over a decade in the fitness industry. "My passion is to deliver an exceptional experience for our members."

Come Meet the Team

Your first two days are on us — and a trainer-led Starting Point Session is included with every new membership.

Get Your Free Pass
Google Reviews

What mActivity Members Say

Visit Us

In the Heart of East Rock

285 Nicoll Street
New Haven, CT 06511

Mon – Fri: 6 AM – 9 PM
Sat – Sun: 7 AM – 7 PM
203-936-9446

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