How much does personal training cost in Boston at First Guess Fitness?

1:1 personal training ranges from $95 to $135 per session, semi-private (6:1) coaching is $45 to $65 per session, and an introductory 4-session Booster Pack trial is available for $99.

What is semi-private personal training?

Semi-private training at First Guess Fitness consists of up to 6 people per session, where each individual follows their own personalized program under the direct guidance and form correction of a coach.

Where is First Guess Fitness located?

First Guess Fitness is located at 30 Court Square, Boston, MA 02108, directly in Downtown Boston near Government Center and Downtown Crossing.

Semi-Private Personal Training vs. 1:1 vs. Group Classes: What Boston Professionals Need to Know

By Justin Kompf — 2026-08-17

Direct Answer: Semi-private personal training (typically 4–6 clients per coach) combines the customized programming and technique feedback of 1:1 training with the cost efficiency and supportive atmosphere of small group sessions. For busy downtown professionals who want structured strength progressions without paying $150+ per hour, semi-private coaching offers the most sustainable long-term model.

Quick Comparison Matrix

Feature	1:1 Personal Training	Semi-Private Training (FGF Model)	Boutique Group Fitness
Coach-to-Client Ratio	1:1	Max 6:1	15:1 to 30:1
Programming	Fully customized	Individualized to your specific goals	One generic workout for the whole room
Form & Technique Feedback	Continuous	Continuous every set	Minimal / pacing-focused only
Typical Boston Pricing	$120 – $180+ / session	~$40 – $65 / session	$32 – $42 / class
Injury & Pain Modification	Immediate adjustments	Immediate adjustments	Difficult during fast intervals
Best For	Specific rehab / elite prep	Long-term consistency & strength	Calorie burning & high-energy cardio

3 Questions to Decide Which Fits Your Schedule

Do you need a workout or a progressive plan? Group classes change daily, making progressive overload difficult. Semi-private training tracks your weights week over week.
Are you dealing with nagging desk posture or joint pain? In a 6:1 setting, exercises can be swapped instantly (e.g., trap bar deadlift instead of barbell).
What fits your monthly budget long-term? Sustainable habits require 2–3 sessions per week; semi-private coaching cuts the cost of consistent coaching by more than half compared to traditional private training.

Learn more about our semi-private personal training in Boston, 1:1 personal training, or see what personal training costs in Boston.

Frequently Asked Questions

Will I fall behind if others in the session are more advanced?

No. Each person follows their own independent workout card. You do not share weights or move in sync with the group.

Where is this offered in Boston?

First Guess Fitness offers semi-private coaching at 30 Court Square, steps from Government Center, City Hall, and the Financial District.

About the Author: Justin Kompf, PhD, is a behavior-change scientist, strength coach, and co-founder of First Guess Fitness in Boston, MA. He specializes in progressive resistance training, evidence-based habit formation, and exercise psychology.