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Mary M Rankin, CPA


Position: Owner and founder of Fit your World, Creator of specialized group fitness classes, Master Trainer, Group Fitness Instructor, Specialized personal trainer and CPA

Years of experience: Over 20 Years

Degree: BA in Accounting from St Xavier University


 Certifications and Credentials: 

ACE group fitness

ISSA personal trainer          

ACSM personal trainer

Kickboxing Specialist 

Turbokick Certified

Tabata Certified

Flirty girl fitness-booty beat certification

Creator of sphere-o-sculpt and Deskercise

Pre and post natal certified

Certified in holistic nutrition

CPA designation

Mary Rankin is the founder of FYW fitness and has over 10,000 hours of hands on experience teaching and working 1 on 1 with personal training clients.She also has over 500 hours of  experience training clients with disabilities. Mary is a mother of 2 children and struggled with her weight in her 20's. She is passionate about helping other people become healthier and confident with themselves at every age. 



Position: Group Fitness Instructor/Personal Trainer 
Years of experience: Over 6 years

Degree: Bachelors degree in education

Certifications and Credentials:
NASM Certified Group Fitness Instructor 
NASM Certified Personal Trainer 
Certified Nutrition Coach     

Beyond Mat Science certified

Cycling  certified                   

Vinyasa Flow Yoga

Cardio Kixboxing    

Hi I’m Debi Knapp. I’ve been a fitness instructor for the past six years, but have been a fitness enthusiast my whole life! I currently have certifications through NASM in group fitness , Beyond Mat Science, Cardio Kick-box, Cycling and Vinyasa Flow. I love learning and have just completed my nutrition certification! I’m also a full time art teacher and mom of a ten year old! 


Liz Lininger



Position: Group fitness Instructor

Years of Experience: 

Degree: BS in Teaching from University of Illinois


Certifications and credientials:


Position: Group fitness Instructor

Years of Experience:



Certifications and credientials:



Position: Co-owner, Operations manager, Personal trainer, sports conditioning trainer

Years of Experience: Over 20 years experience in sports and fitness. Active for over 15 years in participating and coaching organized sports. 

Certifications and credentials:

ACSM certified personal trainer

Sports conditioning specialist for soccer


Sports and fitness have always been an intricate part of Thomas's life. He has successfully recovered from 2 knee injuries and specializes in helping clients recover from sports injuries. 

Thomas is also the Operations manager for FYW fitness.  

Michael Kowalczyk


Position: Personal trainer

Years of Experience: 2 1/2 years experience in sports and  fitness

Certifications and credentials:

ISSA Certified Personal trainer

specializing in clients ages 12 to 18

 Mike is a senior at St. Rita High School. He has lost 75 pounds over the last year and it has completely changed his life. He understands the struggles of being overweight and has the unique ability to relate to clients going through the same problems with compassion and commitment.


Mike's story

Loosing 75 pounds was not an easy thing to do, but the result a year later has changed my life.  I was not a confident person, blaming everyone for not losing the weight.  Then I found an awesome trainer that got me started on the journey.   This trainer pushed me, knowing that I could do the work, I just needed the confidence.  Weight loss was a slow journey.  There were times I wanted to give up.  But my trainer didn’t give up on me.  I want to help others and help them reach their goals. 

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