Since 2009

About Us

where we are

4 Coleman Ave (off East Silver Street)
Westfield, MA 01085

Our Mission

We are a CrossFit community that was established in 2009, and are one of the most experienced CrossFit gyms in the area. All of our Swarm coaches are educated to provide the most current, highest quality training, nutrition, and fitness programs.  Our CrossFit program is comprised of functional movements, constantly varied at high intensity. This includes Olympic Weightlifting, Power Lifting, Kettlebells, Dynamic Plyometrics, Gymnastics, and much more.  In addition to our CrossFit program, we designed our BEx Training that is perfect for beginners or those not interested in the higher skilled weightlifting and gymnastic training CrossFit provides.  We also offer CrossFit KIDS training to ages 5-12.

We are dedicated to helping you and your family achieve optimal health, well-being and fitness. We will encourage you to work hard, provide you the support and accountability needed to achieve results.  All workouts are scalable to your ability and fitness needs.   

We promise, the hardest part is reaching out.  We are here for you every step of the way.  Come see what sets us apart. Let us help you change your life!

“we pride ourselves on a having an inclusive & welcoming community. We are swarm strong.”

Swarm is a coaching/training facility. You will have certified trainers coaching every time you step into our doors. At a local gym like the local YMCA or Globo big box gym you may only pay $50 a month. This is just a facility access fee. This fee gives you access to their gym. Inquire about personal training there and you’ll see the value of a our coaching memberships. In our group fitness classes, all are coach led and provide one on one training opportunities throughout every session.  And let’s face it, our group classes are a lot more FUN!

In addition to professional fitness training, we also offer one-on-one Nutrition coaching (both in person and virtually).

Brian Cook / Owner

CrossFit Level 2 Trainer (2011,2016)
CrossFit Level 1 Trainer (2009)
CrossFit Nutrition Trainer
Certified HSN Nutrition Coach
CrossFit Olympic Lifting Trainer
CrossFit Endurance Trainer
CrossFit Powerlifting Trainer
CrossFit Kids Trainer
CrossFit Movement and Mobility Trainer
Rocktape Performance Movement Taping
First Aid/CPR/AED Certified

I was very athletic in high school playing Baseball, Soccer and Tennis. I went to college, left all sports and gained some weight over the years. I decided to take charge and change my life so I started Bodybuilding. I did a traditional bodybuilding routine and nutrition program for years. I then started getting into Triathlons for more diversity. I found CrossFit by accident in 2008. I was researching off-season training for triathlons. I was also post injury from a bicycle accident which resulted in surgery to my optical socket. I tried CrossFitting by following the main site and realized quickly that I didn’t have the equipment. I went to the only affiliate in Western Mass, PVCF. They were in Easthampton at the time. After about a year, I heard that they were moving to Northampton. Deciding that was too far to drive everyday, I took a deep breath, and decided that I should affiliate. I became CrossFit Level 1 certified in October 2009 and moved to my first location (the floor space was 500 sq. ft. with only 12 clients!) When we opened we were the 2nd CrossFit affiliate in Western Mass. We kept growing and in March 2011, moved into a 4000 sq. ft floor space on Mainline Drive in Westfield and then to our current location, 4 Coleman Ave, Westfield, which has 5000 sq, ft of floor space.  I never did a triathlon since, because CrossFit became my sport. I ran the SunTrust National Half Marathon in D.C . in April 2009 and I trained CrossFit only for it. I did only one training run which was 8 miles long. Most of my runs in CrossFit were less than a mile. The reason that I started Swarm was to help as many people as I could get fitter, healthier, and happier.

 Mary Cook / Owner

CrossFit Level 2 Trainer (2021)
CrossFit Level 1 Trainer (2018)
Certified HSN Nutrition Coach
Adult CPR/AED Certified
CrossFit Spot The Flaw Course
CrossFit Scaling Course
CrossFit Judges Course (2019)

As owner of Swarm with Brian, it is our passion to help our members achieve their goals and learn all they are capable of.  It is so rewarding to be part of their health and wellness journey. My passion to help others achieve their potential stems from my own transformation story. 

I grew up a heavy child and only continued to gain weight through my teens. At 21 I was at a routine Dr’s appt and couldn’t believe the scale read 352.5 pounds.  I was told I would end up in a wheelchair if I didn’t do something about my weight and that my knees would soon be giving out on me. I was guided towards weight loss surgery.  I was mortified, embarrassed for what I had allowed myself to get to. I knew I didn’t want to have surgery and that I could do it on my own. I used those feeling to ignite a desire in me to make a change and begin my weight loss journey. It was a LONG road with many ups and downs and life events that took place, but I never game up.  Having more good days than bad days, leveraging portion control and making healthy nutritious food choices, I finally hit my personal goal of losing 200 pounds on my 35th birthday in Nov 2014!! Consistency is KEY!


When I began my journey I could only walk for a few minutes at a time.  I slowly worked my way up to a Planet Fitness membership and began a running habit and strength training routine.  In July 2014 I became a licensed Zumba instructor and began teaching my own classes 6 days week. I loved the people!  Motivating and holding each other accountable – the amazing friendships.  After several years of Zumba, I was ready for a new challenge.  I tried CrossFit for the first time at SWARM in October 2016 and instantly fell in love (with CrossFit, and with Brian too! haha).  I started shadowing Brian in early 2017 and became Level 1 Certified in Jan 2018 and in Sept 2021 became Level 2 certified.  I love learning and am relentless in pursuing all that we can at Swarm to provide our members with the best experience possible.  I love being able to share my story with our members as well as the things I’ve learned to help me stay consistent along my journey.  I relate to them so much and continue to walk the walk.

We truly offer life changing fitness and nutrition for the whole family!  I’m so proud of the incredible community we have.  #swarmstrong #swarmfamily

Erin Hull

CrossFit Level 1 Trainer (2015, 2020)
Adult CPR/AED Certified
I started my CrossFit journey almost 11 years ago. I have been coaching about 6 years now and love the sport. I have always struggled with my weight and continue to, but working on my nutrition with our coaches and continue to come to the gym.  Put my hard work in and always leave feeling better then when I arrive. Its a truly amazing place that will change your life if you let it.

Mike Welch

CrossFit Level 1 Trainer (2016, 2021)
CrossFit Judges Course (2019)
Adult CPR/AED Certified

Patrick Sullivan

CrossFit Level 1 Trainer 
Adult CPR/AED Certified

Michelle Coach

CrossFit Level 1 Trainer
Adult CPR/AED Certified

Alex Church

Adult CPR/AED Certified



Gym H0urs

Monday: 5am – 9am and 4pm-6:15pm
Tuesday: 5am – 9am and 4pm-7:30pm
Wednesday: 5am – 9am and 5:15pm-7:30pm
Thursday: 5am – 9am and 4pm-7:30pm
Friday: 5am – 9am and 4pm-6:15pm
Saturday: 730am – 10am
Sunday: 9am – 10am


Facility Features:

  • 3 Bathrooms  (2 Showers)
  • 2 Changing Rooms
  • Outdoor shower (seasonal)
  • Swarm Store/Lobby Area
  • After Hours Access
  • Kids Rooms (not supervised)
  • Access to Bike Trail