EVENT TRAINING
Hyrox / Marathon / Event Training
Structured race prep and event-specific conditioning for Hyrox, marathons, and beyond.
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YOUTH
Youth Sports Performance
Building the athletic foundation young athletes need to thrive in any sport, at any level.
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FITNESS
Fitness & Strength
Small group and 1:1 training tailored to your goals — strength, endurance, or just feeling better.
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Premiere Personal Training in Sudbury
About Us
We Meet You Where You Are
At Duddy Performance, we meet you where you are — whether you're new or experienced — with expert coaching in a supportive, non-intimidating environment, so you can get stronger, faster.
We train kids, athletes, adults, and grandparents. We only offer small group and personal training. You won't find large groups in our facility.
WHAT WE OFFER
Featured Programs
Expert coaching across every stage of your fitness journey.
Hyrox Training
Race-specific prep, functional fitness, and endurance work to get you across the finish line strong.
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Small Group Personal Training
All the energy of a group class with the personalized attention of a private session.
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1:1 Personal Training
Fully customized programming and one-on-one coaching built around your goals and schedule.
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Youth Sports Performance
Speed, strength, and agility training that gives young athletes the foundation to excel in any sport.
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DON'T TAKE OUR WORD FOR IT
What Our Members Have to Say
Real feedback from the Duddy Performance community.
★★★★★
"My favorite gym ever! Everyone is positive and supportive in this very inclusive environment. All of the instructors really care about their clients. It's great for beginners and experienced athletes alike."
Catherine Hunter Kashem
★★★★★
"The best energy, motivation and results! The trainers are all so fun and knowledgeable. Highly recommend coming to check a class out — you will definitely sign up for another and another."
Joja Schoofs
★★★★★
"Liza has been coaching me for 2 years to build increased strength while also programming my ultra marathon training plans. I've PRed my half marathon, 50k, deadlift, and back squat while working with Liza."
Julia Becker Collins
★★★★★
"Highly recommend Duddy Performance. All the trainers have been amazing for my daughter. We have seen a difference in her strength, agility and she looks forward to working out which was not the case previously."
Angela Daniels
THE PEOPLE BEHIND THE PROGRAM
Meet Our Team
Liza Duddy
Founder & Owner
Jen Karam
Community Organizer,
Coach
Mo Hamel
Marketing & Social Media Manager, Coach
David Harding
Sales & Member Success Manager, Coach
Jenn Gray
Merchandising & Brand Manager, Coach
Meet the Entire Team →
START YOUR JOURNEY
Get Started Today
Ready to take the first step? Fill out the form below and we'll be in touch to find the right program for you.
Ready to Hustle?
New to Duddy Performance? Sign up for one of our intro offers and jump right in
GET STARTED
Train Like It Matters at Duddy Performance
We're dedicated to empowering athletes and fitness enthusiasts of all ages to unlock their full potential. Through expert coaching, personalized programs, and a supportive community — we meet you where you are.
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Duddy Performance
Premiere personal training in Sudbury, MA.
Email: coachliza@duddyperformance.com
Phone: 978-917-9091
Duddy Performance
33 Union Ave
Sudbury, MA 01776
Hours of Operation:
Mon–Fri: 5am – 7pm
Saturday: 7am – 1pm
Sunday: 7am – 1pm
Useful Links
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Let's Get Started
Your First Step
Starts Here.

Fill out the form below and a member of our team will be in touch to match you with the right program, coach, and next step.

Free consultation — no commitment required
We'll match you with the right coach & program
Based in Sudbury, MA — in-person & online options