Train the body. Sharpen the mind. Own the game.
Sports Performance Training in Mississauga
Ternion Fitness and Athletics provides sports performance training in Streetsville, Mississauga. The facility integrates athletic training, sport psychology, athletic therapy, and personal training under one roof, led by Sport Psychologist and Certified Athletic Trainer Sly Walters MSc. Founded in 2014. Serving the Greater Toronto Hamilton Area.
Five Programs
One System
Built around the work that compounds across seasons. Pick the track that fits how you train.
01 / 05Athletic Training
Strength, conditioning, sport-specific development for rostered athletes.
02 / 05Personal Training
Athlete-style 1-on-1 coaching for driven adults.
03 / 05Mental Performance Training
Sport psychology, mental toughness, performance under pressure.
04 / 05Group Training
Small-group athletic development for young athletes 10–18.
05 / 05Athletic Therapy
Injury assessment, rehab, and return-to-play with a Certified Athletic Therapist (CAT-C).
◆ Talk to usNot sure where to start?
Every athlete and driven adult comes in with different goals, training history, and constraints. The right service track lands fastest in a short intake conversation at our Streetsville Mississauga facility.
Featured on TSN · National Broadcast · 2026
A Dream of a Lifetime
Tani Oluwaseyi
Tani Oluwaseyi started training with Sly Walters as a Mississauga youth athlete. He kept training with Sly through the rise to La Liga with Villarreal CF and a cap for the Canadian men's national team. The TSN feature is the moment a long arc of work became visible nationally.
La Liga
Villarreal CF
Forward
Canada Soccer
National Team
Capped international
◆ In His Own Words
I've worked out with numerous trainers and everyone has different ways of doing things, but the trainers at Ternion have methods that are, in my opinion, superior to all other methods. I've been training here for going on 4 years now, and their in depth understanding of the body and its mechanics allows them to be able to create various workout plans specific to me and what I need. Not only do they train you physically, but mentally as well. Sly Walters has helped push me past the limits I thought I had and into a mental space I never knew I could reach. It's allowed me to excel not only in soccer but in my everyday life. As a D1 athlete, this training has allowed me to stay at the top of my game every single year and I'd recommend it for all high level athletes.
Tani Oluwaseyi
Forward, Villarreal CF (La Liga) · Canadian National Team
The Ternion Approach
Train the body
Sharpen the mind
Own the game
Most facilities address one piece. Athletes get physical training in one place, mental performance in another, athletic therapy in a third.
Ternion was built on a different premise. The body, the mind, and the work of recovery all belong in one environment, programmed against each other rather than around each other.
Real seasons
Real results
Parent of long-term Ternion athlete
“My son has been attending Ternion for six years and the results have been outstanding. I have seen a noticeable improvement in his physical development, strength, and overall endurance. What sets the program apart is that it goes beyond physical training. It also focuses on mental strength and a positive mindset.”
Competitive soccer player
“Highly recommend for athletes of any age in any sport looking to reach that next level. I have seen a huge difference in my strength and conditioning and it has helped me prevent injuries for soccer. Best training I have had by far.”
Personal training client
“Training with Sly has been a game changer for me and my husband. We challenge our bodies in every session with the dynamic training, but more than that, it has developed a more resilient and positive mindset. If you want to push your body and mind to your maximum potential, this is the right place.”
Why athletes
choose Ternion
Whole-athlete development.
Physical training, mental performance, and recovery work as one system. Programming sees the athlete in full rather than addressing a single piece in isolation.
Mental performance, integrated.
Most facilities skip the mental side. Sport psychology is a core service at Ternion, programmed alongside physical training rather than treated as a separate add-on.
Coaches who have lived it.
Every coach has competed at pro or semi-pro level. The work is informed by real experience, not theory, and the standards reflect that.
Holistic recovery under one roof.
Certified Athletic Therapy delivered on-site. Injury assessment, rehab, and return-to-play handled in-house, not fragmented across separate clinics.
◆ Credentials + Partners
Real credentials
Real partnerships
Years coaching
Sport Psychology
Athletic therapy
Featured 2026
◆ Partnered With
◆ Service Area
Based in Streetsville
Serving the GTA
66 Thomas Street, Unit 32Streetsville, Mississauga
ON
Cities served
- Mississauga
- Streetsville
- Oakville
- Brampton
- Etobicoke
- Toronto
- Hamilton
- Burlington
Three steps
Trust the Process
Book.
Submit the form or call. Schedule your intake.
Assess.
Movement screen, baselines, the right service track.
Train.
Programmed sessions. Reviewed every four weeks.
Frequently Asked Questions
What is Ternion Fitness and Athletics?
What services do you offer in Mississauga?
Who do you work with?
Where are you located?
Do I need to be an elite athlete to train at Ternion?
How do I get started at your Streetsville Mississauga facility?
Train the body. Sharpen the mind. Own the game.