The Team

Who We Are


Robyn Nicholson

Owner, Gym Instructor & Personal Trainer

I qualified as a level 2 gym instructor in 2013 I then went onto graduate from Teesside University with a BA (Hons) Degree in Dance in 2016 and qualified as a Personal Trainer in 2018. I am also qualified in Pre and Post Natal Exercise, Nutrition, Exercise to Music, Circuit Training, Kettlebells, Spin, Zumba and Clubbercise. 

I am currently training to be a Yoga instructor which can't wait to bring to Infinity once qualified! I teach classes including HIIT, Spin, Infinity Bounce, Circuits and Stretch & Tone, and also do Personal Training at Infinity Fitness. I love helping people reach their goals and seeing their confidence grow  both physically and mentally. 

My amazing mam and business partner is my inspiration for becoming a fitness instructor. Seeing her motivate and inspire so many people to be the best version of themselves and the joy that her job has brought her made me want nothing more than to follow in her foot steps. 


Karen Nicholson

Owner & Gym Instructor

I qualified as an Exercise to Music instructor in 1992 and Level 2 Gym Instructor in 1997. I have gone onto qualify in Exercise for Children, Exercise for the Frail and Elderly, Spin, Zumba, Zumba Gold, Zumba Toning, Zumba Kids, Just Jhoom, Clubbercise and Circuit Training.

I teach classes suitable for all ages and abilities including Zumba, Clubbercise, Aerotone, Legs, Bums & Tums, Step and Pump it up. I love helping members achieve their goals.

I became a fitness instructor because I felt I could make a difference to peoples lives. After being made redundant in 2017 we decided to open Infinity Fitness. It has always been a dream of mine since becoming a fitness instructor to open my own gym and in 2018 my dream came true. It has been an amazing journey to see what we have achieved over the last few years and seeing our little gym community grow.

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Sarah Basnett

Gym & Class Instructor & Personal Trainer

I qualified as a Level 2 Gym Instructor in 2018 and qualified as Personal Trainer in 2020. 

I began working at Infinity Fitness in 2021 as a gym instructor and personal trainer. I currently teach Circuits and Tabata classes at Infinity Fitness. I also do 1-1 and 2-1 Personal Training at Infinity Fitness, I love helping my clients to achieve their personal goals and helping them to feel body and mind positive!

I became a Fitness Instructor to help boost other peoples fitness and confidence and to show fitness has no restrictions and anyone can reach their goals. 

Sam Vernon

Gym & Class Instructor & Personal Trainer

I qualified as a Gym Instructor in 2017 and Exercise to Music and Water based exercise in 2018. I am also qualified in Spin, Barbells, Core Conditioning, Circuits, Bootcamps, Kettlebells, Insanity and Boxing/Padwork. I am currently doing my Level 3 Personal Training qualification which I will complete in 2022. 

At Infinity Fitness I teach Spin, Legs and Core Blast, Power Pump, HIIT and Dance Aerobics/Motown Aerobics. 

I decided to become a fitness instructor as I was suffering from work place depression and the only thing that helped me cope was attending the gym and a mix of classes.

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Dee Gibson

Sublime Health & Aesthetics Owner

          Lucy Shorter

Sublime Health & Aesthetics Trainee

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Infinity Fitness is home of Sublime Health & Aesthetics