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Boston Strength Training

The best strength training studios in Boston

We looked at over 460 reviews across seven strength training studios to find where Boston’s best strength training experiences happen. Whether you’re drawn to CrossFit, circuit training, or bootcamp-style classes, the greater Boston area has a deep bench of studios that consistently earn rave reviews from the ClassPass community.

Studios were selected based on review volume, average rating, and consistency of positive feedback.

1. Olympia Fitness + Performance – Functionally Fit

With a perfect 5.0 average rating across 54 reviews, Olympia Fitness + Performance stands out as Boston’s top-rated strength training destination. Their Functionally Fit class blends bootcamp-style conditioning with purposeful strength work, and their High Intensity Core class (also a perfect 5.0 across 36 reviews) proves this studio’s consistency is no fluke. Reviewers consistently highlight the programming and the supportive coaching.

Rating: 5.0 (54 reviews)

2. CrossFit Tri-County – CrossFit WOD

CrossFit Tri-County pairs serious programming with a warm, community-driven atmosphere. Their CrossFit WOD class carries a 4.97 average rating across 90 reviews, making it one of the most-reviewed and highest-rated strength training classes in the Boston area. Members love the coaches who genuinely invest in your progress, no matter where you’re starting from.

“Great energy and a great group of people. Very inviting, and it’s wonderful to have a coach who cares about your growth.”

Rating: 4.97 (90 reviews)

3. DiHard Fitness – 30 MIN SPIN/30 ON THE FLOOR

DiHard Fitness delivers a unique hybrid format that combines cycling with strength stations, earning a 4.93 average rating across 46 reviews. The rotating-station setup keeps every class feeling fresh, and the instructors are known for being knowledgeable about proper technique and modifications. Whether you’re experienced with strength training or brand new, this class meets you where you are.

“This class has everything. Between the cycling and various stations, it kept my heart rate up. I love that we rotate between stations at a pace I can maintain for the entire duration. I recommend this class for everyone.”

“Such a fun class with great challenges embedded throughout the stations. I enjoyed the variety of movements, and I cannot say enough about how welcoming this group is.”

Rating: 4.93 (46 reviews)

4. RECK Fitness – Power Hour

RECK Fitness brings a boutique, personal-training feel to their Power Hour class, which holds a 4.89 average rating across 46 reviews. Small class sizes mean the coaches can keep a close eye on your form and offer real-time modifications. Reviewers frequently mention how comfortable they feel, even as first-timers.

“The instructor provided modifications when I was struggling with exercises, encouraged me to go at my own pace, and made me feel super comfortable. I highly recommend taking a class here.”

“The mobility class was fantastic. Class size was small and the instructor was attentive. Highly recommended.”

Rating: 4.89 (46 reviews)

5. CrossFit Southie – CrossFit

CrossFit Southie is a Boston institution with a reputation for being one of the most welcoming CrossFit boxes around. Their CrossFit class carries a 4.89 average rating across 38 reviews, and the community-first culture shines through in every review. Coaches go out of their way to offer modifications, tips, and encouragement, especially for newcomers.

“The instructor and fellow classmates were awesome and super welcoming. I knew absolutely nothing, and they gave modifications, tips, and kept an eye out for me. I will be back!”

Rating: 4.89 (38 reviews)

6. Marblehead Fitness Center – Circuit Blast

Marblehead Fitness Center’s Circuit Blast class blends cardio and strength in a fast-paced circuit format, earning a 4.85 average rating across 33 reviews. The instructors bring contagious energy that keeps you going even when the reps get tough. It’s the kind of class that makes you push harder than you would on your own.

“The instructor is upbeat, easy to follow, and has great music. She keeps you going with her energy and enthusiasm even when you are getting a little tired. Loved the weights and cardio class.”

Rating: 4.85 (33 reviews)

7. BodyScapes Fitness – HIIT

BodyScapes Fitness in Cambridge offers a HIIT class that blends high-intensity intervals with strength-focused movements. With 121 reviews and a 4.69 average rating, it’s one of the most popular strength training options in the Boston area. Members love the efficient 45-minute morning format that fits neatly into a busy schedule.

“Love the 45-minute format in the morning so I can get a quick class in before work.”

“This class was great! I loved the combination of full body stretches and dynamic mobility movements, and the instructor was really nice, good at explaining the moves, and attentive.”

Rating: 4.69 (121 reviews)

Discover your next strength training class in Boston

From CrossFit boxes with tight-knit communities to circuit-style studios that keep every class feeling new, Boston’s strength training scene has something for every fitness level and goal. Browse all strength training classes in Boston on ClassPass.

Compliance checklist

  1. Trial/pricing language: PASS – No mention of free trials, specific pricing, unlimited access, or subscriptions.
  2. Partner sentiment: PASS – All seven studios framed positively. No negative comparisons between studios.
  3. Lead gen language: PASS – CTA is invitational (“Discover your next…”), no false urgency or pressure language.
  4. Savings/value claims: PASS – No dollar amounts, price comparisons, or savings promises.
  5. Health claims: PASS – All language is experiential. No guaranteed outcomes or medical claims.
  6. Review attribution: PASS – No user names disclosed. All quoted reviews are from 4+ star ratings. Informal reviews lightly paraphrased for clarity.
  7. Terminology: PASS – “ClassPass” spelled correctly, “studio” used throughout (not “gym”), “community” (not “customers”), “credits” terminology not misused.
  8. Inclusive language: PASS – Gender-neutral language throughout, welcomes all fitness levels, no elitist or exclusionary framing.
  9. One Narrative leaks: PASS – No SmartSpot, revenue, payout, excess capacity, or partner-facing terminology.
  10. SEO basics: PASS – Primary keyword “strength training” in H1, “Boston” in title, H1, and multiple subheadings. Meta description is 102 characters with soft CTA, under 160-character limit.

Data sourced from CP_BI_DERIVED.DATAPIPELINE.TOPS_IN_CITY and CP_BI_DERIVED.DATAPIPELINE.SCORE_COMMENTS on 2026-02-18.