Katherine McMackin

Lead Trainer / Coach for GTS
ACE Fitness Certified Personal Trainer
Certified StrongFirst SFG Level 1 Kettlebell Instructor
Level 1 TRX Group Suspension Training Qualified
StrongFirst Bodyweight Training Course Completion
Red Cross CPR/AED certified

Nutrition Education:
Certified Culinary Nutrition Expert, Academy of Culinary Nutrition
ACE Weight Management Specialist Certification
Precision Nutrition Level 1 Certification
Plant-Based Nutrition Education Course
BFA Studio Arts & Education, Rosemont College

I’ve struggled with my weight and body image for as long as I can remember. During my early twenties I gained a significant amount of weight.  I finally committed to a weight loss program back then and lost over 50 pounds.  Since that time, I had two kids and watched my weight fluctuate like a roller coaster, never fully able to get back into my “skinny jeans”.

A few years ago, fed up with the struggle to lose that stubborn weight, I started training for a local 5K race and added strength training. My goals of being fit and healthy went from being able to fit into my skinny jeans, to wanting to be strong, healthy and athletic. Not only did my commitment to exercise and a healthy diet pay off, but I was able to accomplish things I never thought I would be capable of. I am so passionate about the things people can accomplish through committed exercise and healthy living that I wanted to make it my job to help others feel as good as I do, or better.

Lost 60 lbs and maintain a fit healthy lifestyle
Completed two Half Ironman distance triathlons
Completed multiple Half Marathons
Completed two Full Marathons

I believe that people greatly underestimate themselves.  I know, because I underestimated myself!  Give yourself the time and the focus to make healthy choices every day and make fitness a priority, which really means making you a priority.  It won’t be a point A to point B journey, there will be many bends and twists on the road between, but your goals should always be in sight. Take small measurable steps, ask for help when you need it, and be patient enough with yourself to let your body adapt to the process.

3-4 days of strength training with kettlebells, TRX and functional training at GTS, 2-3 days of cardio workouts that include running, but I also enjoy Pilates, yoga and my new favorite hobby, paddleboarding.  Basically, just keep moving.

I am a sucker for chick flicks. My favorite movie is The Holiday.  Who can resist Jude Law’s British accent?

Catalyst to help preserve your hard earned lean muscle and Mango Strawberry Spark.

Jeremy Gritton

Owner, Coach

NFPT Certified Personal Trainer, CPR and AED Certified, RKC Level 1 Kettlebell Certified, Bachelor of Science in Business Management; Minor in Sports Management

Katherine McMackin

Lead Trainer, Coach

ACE Fitness Certified Personal Trainer, American Heart Association CPR/AED certified, StrongFirst SFG Kettlebell Education, Level 1 TRX Group Suspension Training Qualified, ACE Weight Management Certified Specialist, Precision Nutrition Certified Coach (Pn1) Certified Culinary Nutrition Expert, Academy of Culinary Nutrition

Molly Worrell

ACE Certified Personal Trainer American Heart Association CPR /AED Certified Bachelor’s Degree in Nursing (BSN) – Vanderbilt University

Jodi Fritz

ACE Certified Personal Trainer Red Cross Certified Lifeguard and Swim Instructor CPR and AED Certified ACE Fitness Nutrition Certification Degree in Recreation and Leisure Services

Kim Day

NFPT certified personal trainer RKC Level 1 Kettlebell Certified American Heart Association CPR/AED certified

Kari Thompson

New Member Success Coach for GTS ACE Fitness Certified Health Coach, AAMA Certified Medical Assistant Red Cross CPR and AED Certified Degree in Recreation and Leisure Services

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