Jack Spence de Boer
Worthing Leisure Centre
Worthing
13 votes
About
Qualifications
Specialisms
Location
Reviews
About
Hi, I’m Jack, a dedicated Personal Trainer passionate about helping people unlock their full potential through fitness. My journey began 5 years ago with mental health struggles, the gym really helped me mentally as well as physically. My goal is to help you feel like the best version of yourself, both mentally and physically through the journey of fitness.
I’m making it my mission to empower clients to achieve their goals, whether it’s building strength, improving endurance, or simply feeling better in their day-to-day lives.
I believe that fitness is not a one-size-fits-all journey, which is why I create personalized programs tailored to your needs, preferences, and lifestyle.
With a focus on muscle building, fat loss and personalised nutrition plans. I’m here to guide you every step of the way, helping you celebrate every victory—big or small.
Don’t be afraid to contact me for a free consultation either by phone or face to face, Let’s work together to make your fitness journey fun, transformative and life changing.
I’m making it my mission to empower clients to achieve their goals, whether it’s building strength, improving endurance, or simply feeling better in their day-to-day lives.
I believe that fitness is not a one-size-fits-all journey, which is why I create personalized programs tailored to your needs, preferences, and lifestyle.
With a focus on muscle building, fat loss and personalised nutrition plans. I’m here to guide you every step of the way, helping you celebrate every victory—big or small.
Don’t be afraid to contact me for a free consultation either by phone or face to face, Let’s work together to make your fitness journey fun, transformative and life changing.
Qualifications
Level 2 Gym Instructor
Level 3 Personal Trainer
Level 3 Personal Trainer
Specialisms
Muscle Building
Weight Loss
Advanced Training Systems
Nutritional Support & Advice
Personalised Programmes
Resistance Training (hypertrophy)
Lifestyle and Habit Changes
Weight Loss
Advanced Training Systems
Nutritional Support & Advice
Personalised Programmes
Resistance Training (hypertrophy)
Lifestyle and Habit Changes
Location
13 Reviews
13 out of 13
Been training for Jack for a year now and not only have a gained a new friend to talk to 24/7 guidance, Feeling and looking stronger. Thanks Jack.
Joe Page
I’ve worked with several trainers in the past, but Jack truly stands out as exceptional. From day one, they took the time to understand my goals, limitations, and lifestyle, creating a personalised program that was both challenging and sustainable and helped me reach my best
Their coaching style is the perfect blend of knowledgeable, motivating, and supportive. Whether it’s correcting form, pushing me to get that last rep, or celebrating progress, Giant Jack always brings positive energy and genuine enthusiasm to every session. I’ve noticed real improvements in my strength, confidence, and overall health—and I owe that to their expertise and dedication.
Barney Monk
Their coaching style is the perfect blend of knowledgeable, motivating, and supportive. Whether it’s correcting form, pushing me to get that last rep, or celebrating progress, Giant Jack always brings positive energy and genuine enthusiasm to every session. I’ve noticed real improvements in my strength, confidence, and overall health—and I owe that to their expertise and dedication.
I have known Jack for years and currently use him as my PT. As someone new to the gym I really needed proper 1-1 training. Jack is great for making sure I understand each exercise and how this benefits me. Would completely recommend.
George
George Hughes
George
I’ve tried several PTs in recent years and none have made me feel as confident, capable and driven as Jack has. He makes it easy to get myself in the gym. Professional, attentive and thorough, there is no one I’d recommend more.
Obi Parker
Amazing guy so down to earth, he is very easy to get on with and can help you to really achieve your goals however big or small!!
Ryan Cooper
I wholeheartedly recommend Jack! Before working with him, I thought I had hit a plateau, but Jack's expert knowledge and unwavering motivation completely redefined what was possible. He has genuinely put me in the best shape of my life.
Jack is both encouraging and professional. He focuses intensely on proper form and tailors every workout to be challenging yet safe. He doesn't just train you; he teaches you sustainable habits.
Thanks to Jack, my strength is up, my energy is through the roof, and my confidence has skyrocketed. If you want permanent, life-changing fitness results, Jack is the trainer you need.
Aaron Wilson
Jack is both encouraging and professional. He focuses intensely on proper form and tailors every workout to be challenging yet safe. He doesn't just train you; he teaches you sustainable habits.
Thanks to Jack, my strength is up, my energy is through the roof, and my confidence has skyrocketed. If you want permanent, life-changing fitness results, Jack is the trainer you need.
Jack is such a driven PT who genuinely wants the best for his clients. He’s dedicated and loyal to his work and won’t stop until he gets you the results you want. Just an all round great guy with amazing ethic and positive attitude
Saskia
Not only did Jack show me the proper way to lift weights but also taught me about increasing muscle mass, improving cardiovascular and calorie deficits, he is more then a pt he is miracle worker if I could give more then 5 starts I would
Harrison Bone
Jack is such a great trainer. He has helped me massively with my confidence and achieved such great results! He is so knowledgeable and can tell he’s very passionate about what he does. Highly recommend!
Ellie Schwalm
Professional, attentive and results driven.
Jack will get the most out of you every time - encouraging me to get in the best shape of my life.
Could not recommend Jack enough; regardless of whether you’re a beginner or a seasoned pro.
Jordan Sulaiman
Jack will get the most out of you every time - encouraging me to get in the best shape of my life.
Could not recommend Jack enough; regardless of whether you’re a beginner or a seasoned pro.
Have done plenty of 1 to 1 sessions with Jack aiming to improve my strength. He has really helped me to enjoy the gym and feel more confident in a gym setting. Definitely recommend
Dan Hills
I had an excellent experience working with Jack. From the very first session, he was attentive, knowledgeable and genuinely invested in my progression. He took time to understand my concerns, explained every step of the process, and created a plan that truely made a difference.
His professionalism and encouragement kept me motivated, and I saw steady improvements each week. The exercises were effective, the sessions were well structured, and I always felt supported and heard.
I highly recommend Jack to anyone looking for a skilled, compassionate PT who goes above and beyond
Sep Valeh
His professionalism and encouragement kept me motivated, and I saw steady improvements each week. The exercises were effective, the sessions were well structured, and I always felt supported and heard.
I highly recommend Jack to anyone looking for a skilled, compassionate PT who goes above and beyond
Amazing trainer. Helped me achieve great results physically and mentally. Couldn’t recommend him enough.
Harrison Renzulli