Get To Know Our Coaches
Jack Knight BSc (hons)
My coaching started with a childhood shaped by sport and a fascination with how the body moves. After qualifying as a Personal Trainer in 2012, I went on to study Sport Science (Strength & Conditioning) in Cambridge, specialising in Biomechanics, Anatomy, Nutrition, and S&C. This gave me the tools to understand performance on a deeper level.
For over a decade, I’ve worked across private and corporate settings, including leading one of Europe’s largest corporate gyms at HSBC HQ in Canary Wharf, London and Lockeroom Gym in Sydney. At both, I developed an education programme for other coaches — something I still contribute to today.
JKPT was built on a desire to help people take back control of their health and move better, feel better, and perform better. I still love coaching 1-1 and continue to support amazing clients on that journey every day.
– Jack
Alex Mardapittas BSc (hons)
My journey into coaching started early — fuelled by a love for sport and competition, from football to Brazilian Jiu-Jitsu. After a year of military service in the Special Forces of Cyprus, I went on to study Sport & Exercise Science at Swansea University, where I deepened my understanding of human movement and performance.
Alongside my studies, I threw myself into hands-on coaching and began to sharpen my skills. That path took me to Canary Wharf, where I joined a graduate programme with Fitness Mastery. I quickly progressed, becoming Studio Manager at Sweat Clubs and later overseeing the wider business — learning to lead in a high-performance environment.
Now at JKPT, I’m proud to be part of a coaching service built on care, quality, and real results. I thrive on helping people grow stronger, move better, and feel more confident — and I’m just getting started.
– Alex