The Best Gym in Watertown, MA
Arsenal Performance
Strength & Conditioning in Watertown, MA
WHAT WATERTOWN LOCALS ARE SAYING
We help people of all ages build strength, improve health, and train for life through expert coaching and a supportive community.
Do you want to…
Get stronger & leaner?
Coach-led strength and conditioning that builds real muscle, burns fat, and improves how you move — scaled to wherever you're starting from.
Feel better every day?
Training should create energy, resilience, and longevity. We coach intelligent progression so you move well, reduce pain, and stay healthy for the long run.
Make progress in a few hours a week?
Most members train 3–4 hours per week and see real change. With classes and open gym 7 days a week, there's a time that fits your schedule.
Train with a real community?
People from every background and stage of life train side-by-side here. Walking in for the first time is easy when the room is genuinely welcoming.
Don't wait. Get started today!
Programs
Your journey is personal — our programs match your needs
Group Training
Coach-led group training designed to help you build strength, improve conditioning, and feel better in everyday life. Our leveled training system allows beginners, experienced members, and competitive athletes to train side-by-side with programming tailored to their ability and goals.
Strength Class
Build real, measurable strength twice a week. Each session combines a main strength movement with focused accessory work across a four-week block, with variations scaled to your ability and coaching from start to finish.
Personal Training
Highly personalized coaching tailored to your goals, experience level, and lifestyle. Our coaches adjust training in real time based on your movement, progress, and recovery to help you build strength, lose weight, and train safely for the long term.
Nutrition
Practical nutrition coaching for weight loss, muscle gain, performance, and long-term health. Build sustainable habits with guidance from our coaches and proprietary nutrition tracking software designed to keep you accountable and progressing.
Open Gym
Train on your own schedule with access to barbells, racks, kettlebells, rowers, bikes, SkiErgs, sleds, tires and functional training tools. Available during all open hours — classes have priority over space.
WHAT WATERTOWN LOCALS ARE SAYING
5.0 out of 5 — 173 Google reviews
Joining is simple
Three steps to get started
Book Your Free Consultation
Tell us about your goals, your experience, and your schedule. We'll answer every question before you ever step on the floor.
Try A Class On Us
Come in for a trial session. A coach walks you through the warm-up, the movements, and scales the workout to exactly where you are today.
Start Training For Life
Pick the membership that fits, get on a plan, and start building strength, health, and community — with coaching every step of the way.
Our current schedule
Have questions?
Frequently asked questions
We offer coach-led group training, personal training, nutrition coaching, and open gym access. Our programs are built for all experience levels — from beginners to competitive athletes.
Not at all. Most of our members started with little or no experience. Every class is coached and movements are scaled to match your current ability and goals.
We offer flexible membership plans including group training, personal training packages, nutrition coaching, and family options. The best way to find the right fit is to book a free consultation.
Yes. We encourage new members to come in for a trial class or consultation so you can meet the coaches, see the gym, and experience our community firsthand.
Bring comfortable workout clothes, athletic shoes, a water bottle, and a positive attitude. We handle the programming and coaching — you just show up ready to move.