Lee Theisinger
CrossFit Level 1 Coach, Nutrition Advisor at CrossFit Thurrock

Lee believes that fitness should be accessible to everyone, regardless of their starting point, background, size or ability. His own journey in CrossFit has shaped the way he coaches. Having worked hard to improve his own fitness, strength and confidence, Lee understands first-hand that progress doesn’t happen overnight — it comes from consistency, patience and having the right support around you. As a coach, Lee is passionate about helping people realise that they are capable of more than they think. Whether someone is stepping into a gym for the first time, looking to improve their health, build strength or simply feel better in themselves, he brings empathy, encouragement and a genuine understanding of the challenges many people face. Lee has continued to develop his coaching knowledge through a range of specialist certifications, including Strongman training and nutrition qualifications focused on weight management and supporting people living with diabetes. This allows him to help members not only improve their fitness, but also make meaningful lifestyle changes outside of the gym. Alongside coaching adults, Lee also supports our Junior and Teens programmes, helping younger members develop confidence, movement skills and a positive attitude towards exercise. What makes Lee’s coaching special is his ability to meet people where they are. He knows that everyone’s journey is different, and he believes the most important step is simply getting started.

For Lee, the greatest reward is seeing someone achieve something they once believed was impossible — whether that’s lifting a heavier weight, improving their health, gaining confidence, or simply enjoying exercise for the first time. Coach Lee’s goal: To show people of all abilities that fitness is for them, and help them build the confidence to achieve more than they ever thought possible.