Smithtown, New York
Train For Life.
Expert CrossFit coaching, purposeful training, and a community built to help you perform better for the long term.
CrossFit · Coaching · Community
More Than a Gym
A Complete Training Experience
REM Fitness combines expert CrossFit coaching, personalized nutrition guidance, and a supportive community with a long-term approach to human performance. Every program is built around your body, your goals, and your life — so you don't just train harder, you train for life.
Coaching
Coaching With a Purpose
Every member gets direction, accountability, technique guidance, and a plan built around their goals — whether you're brand new to fitness or chasing performance.
- 01Personal Training
- 02Small Group Training
- 03Kid's Training
- 04Teen Training
- 05Senior Training
- 06Nutrition Guidance
Regina MacKay — Head Coach
Programs
Training Built Around You
Programs are assessed and built for every age and ability — with CrossFit coaching and personalized nutrition at the core.
CrossFit Group Training
The energy of a class with the attention of private coaching — every rep has a purpose.
Personal Training
One-on-one programming built around your goals, your limits, and your timeline.
Youth & Senior Training
From kids and teens building confidence to seniors staying strong and independent for life.
Nutrition & Longevity
Fitness and nutrition coaching for healthy, active lifestyles at every stage of life.
Learn More →The Facility
The Space to Get Better
A training environment built for focused work — coaching, community, and room to move.
Small Group Training
All Ages Welcome
Youth Training
Training Floor
CrossFit
Coaching
Performance
Community
Longevity
Why REM
Experience the REM Difference
Purposeful training, expert guidance, real accountability, and performance that lasts. No guesswork — a plan, a coach, and a community behind every rep.
Expert Coaching
Certified CrossFit coaching across Level 1, Level 2, Kids, Masters, and Gymnastics.
Individual Direction
Your fitness is assessed, your goals are evaluated, and your program is built to get you there safely.
Strong Community
Children, teens, adults, seniors, and people with disabilities — everyone belongs here.
Testimonials
Real People. Real Progress.
"Working with REM Fitness and the group classes is super uplifting and encouraging! I definitely love my experience working with Regina and working on techniques and skills to increase my lifts to match my goals and working harder without any intense pressure to go at anyone's pace other than my own!"
"REM fitness is a great place to get your fitness on track. Every workout is specialized for the specific athlete. My workouts are always customized to my ability. Thanks to Regina I workout while recovering from surgery. Great atmosphere, don't hesitate give it a try"
"Regina is awesome!!! I have learned so much about CrossFit, she always takes the time to help you out individually and is fantastic with my special needs son!!! He loves her and she is such a positive influence on him and EVERYONE!! Best coach hands down!!!"
"Working with REM Fitness and the group classes is super uplifting and encouraging! I definitely love my experience working with Regina and working on techniques and skills to increase my lifts to match my goals and working harder without any intense pressure to go at anyone's pace other than my own!"
The People Behind REM
Regina MacKay
Founder · Head Coach
Regina is a Fitness and Nutrition Coach based in Smithtown, NY — passionate about inspiring people of all ages to live healthy, active, fun lifestyles through CrossFit. She works with children, teens, adults, seniors, and people with disabilities, building programs that keep people moving, strong, and confident at every stage of life.
Credentials
CrossFit Level 1
CrossFit Level 2
CrossFit Kids
CrossFit Masters
CrossFit Gymnastics
Getting Started
How to Start
Book a Free Intro
Tell us about your goals and training background.
Build Your Plan
Meet with a coach and choose the right starting point.
Start Training
Begin with clear direction, coaching, and accountability.
Your Strongest Years Are Ahead.
Start with a conversation. We'll help you find the right next step.