Founded in October 2002


Strongfirst Level2 Kettlebell Instructors
Strongfirst Barbell Instructors
Strongfirst Bodyweight Instructors
Flexible Steel Certified Instructors
MMA Fitness Conditioning Specialists

Athletic Leaders is a strength training facility that guarantees results in 12 weeks. All of our trainers are certified. We have a Strongfirst Level 2 kettlebell Instructor, a Strongfirst Barbell Certified instructor, a Strongfirst Bodyweight Instructor and we have 2 SFG level one kettlebell instructors. We are always learning and taking the most up to date courses and certifications that will help our clients achieve their goals. We will make you fall in love with fitness again, you will look forward to our training and you will always be challenged in a positive and safe manner. If you are looking for result’s and would like to train in a positive environment then look no farther. Athletic Leaders is Your Fitness Solution. Personal training, and group classes are available.


Granville Mayers

SFG at StrongFirst and Body Transformation Specialist at Athletic Leaders

Danelys Sarmiento

Manager Trainer at Athletic Leaders Fitness

Alicia Spedaliere

Manager Trainer at Athletic Leaders Fitness

It is by no coincidence that Granville Mayers is a StrongFirstTeam Leader. Not only has he helped countless individuals achieve jaw-dropping transformations, but he’s also a true student of the StrongFirst system. Having traveled to Italy, England, Prague and all throughout Canada with StrongFirst, he makes it a practice to read his SF manuals daily- with copies in his office, car and home.

Granville holds 6 Canadian National Records in power lifting – 3 National Records in bench press, highest total in his weight class, and National Records in squats and the deadlift – all of which he has achieved completely drug free. 

Owner of Athletic Leaders in Mississauga, Granville is the StrongFirst Team Leader for Canada, Certified StrongFirst Lifter, StrongFirst Girya Level 2 Certified Instructor, StrongFirst Bodyweight Instructor and is certified by Flexible Steel.

He has trained A-list celebrities, NBA and NFL players and thousands of people throughout the GTA. Granville has also been featured on Rogers TV and Snap Magazine