Since 2011

About Us



Our Gym

Critical Fitness is a gym that is about being real and realistic with our clients, we are always honest with our clients even though it is sometimes hard to swallow. This honesty allows us to build up the trust needed between our clients and us. Through this trust and honest open-book approach, we can provide the best feedback, advice and coaching to the client. Keeping things real makes for good growth both personally and physically.

We believe that if you are able to try an exercise you might surprise yourself, but Rome wasn’t built in 1 day, so we are firm believers in taking things back a step or two and building your base up and creating more confidence in the movement before we push for the end result.

Our ultimate goal is to push each and every individual to their best ability, no matter what level they are at, and to never paint my client base with 1 brush and generalise them all.

Creating a personal connection and helping the clients reach their goals, whatever it may be, and creating a love for a healthy lifestyle will ultimately bring us happiness.

Finally, A Gym Culture Where
Everyone is Welcome.

Popular Programs

Functional Training Classes

Online Training Programs


Personal / Semi Training

Diet / Healthy Lifestyle

Speciality Training Programs


Real People.
Real ResultS.

We are a Functional Training Gym based in Northcliff. We specialise in functional group classes.

We also offer one-on-one private personal training, boxing lessons, body conditioning classes and Yoga.

Our aim is to help you “Push Your Limits and Change Your Life”, whether your goal is to just be healthier or become the next Iron man/woman. We focus on making you feel at home in the gym and as if you are one of our extended family members.

Meet our Partners


Terri-Anne Boers

Terri-Anne Boers


I graduated with a BSc(Physio) degree from the University of Cape Town in 2002. After completing my year of community service in South Africa I relocated to London, UK to pursue my dream of working abroad. For my first 2 years in London, I worked as a locum physiotherapist in several NHS hospitals gaining experience in various fields. In 2005 I moved into the private sector where I gained a special interest in Musculoskeletal physiotherapy and Orthopaedics.  2012 saw me returning to South Africa and after working as a locum physiotherapist for 2 years I noticed a gap in the market for personalised, excellent physiotherapy services and decided to open up Terri-Anne Boers Physiotherapy.

Dr Geraldine

Dr Geraldine


Heal, Hands and Health

My philosophy is heal, hands and health. I knew I wanted to be a healer and a Chiropractor, from the age of 15 and have since graduated from the University of Johannesburg.

It was a journey of perseverance to achieve my dream of using my hands to treat patients and help them to recover from pain and injury. I am passionate about Chiropractic and the healing power it has to change people’s lives in a non-invasive way.  

Little babies, athletes, stressed students, over worked parents and everyone in between can benefit from Chiropractic treatment that will let them lead healthier lives.

Basically Branding

Basically Branding

All your branding needs

Basically Branding CC is an award-winning business, that has grown consistently since its inception, to become a leader in the print, branding, signage, corporate gifting/clothing and event branding industries. We are based in the North of Johannesburg but have clients all over Johannesburg and South Africa.

Event Branding


Clothing Branding

Vehicle Branding

Litho Print

Corporate Gifts


Push your limits. Change your life.

Critial Fitness

Gym H0urs

Monday-Friday: 5am – 6:30pm

Saturday: 7am – 9pm

Sunday: Closed

Free 1 Day Gym pass