Meet Juan
Your Expert Personal Trainer in St Albans & Harpenden
With over 10 years of experience, JSM Fitness Personal Trainer provides expert mobile and online personal training in St Albans, Harpenden, and Hertfordshire. Whether your goal is to lose weight, build muscle, improve mobility, or boost your fitness levels, I create personalised workout programmes tailored to your needs. Train at home, outdoors, or online with a dedicated personal trainer who keeps you motivated and accountable.
Hi, I’m Juan, founder of JSM Fitness. I have a background as a semi-professional gymnast and over 10 years of experience in the fitness industry helping individuals achieve their health and fitness goals through one-on-one mobile personal training and online coaching. I bring passion, motivation, and real results to every client across St Albans, Harpenden, and most of Hertfordshire.
My approach is personalised, science-based and results-driven. I focus on strength training, fat loss, functional movement and nutrition to ensure you get sustainable, long-term results. Helping you achieve your fitness goals - in a way that fits your lifestyle and location.
Why Train With Me?
Certified Personal Trainer – With expertise in weight loss, strength building & functional fitness
One-to-One Mobile & Online Coaching – Workout from the comfort of your home, outdoors, or online
Expert Guidance & Support – Whether you're a beginner or advanced, I customise every session for you.
Flexible & Convenient – Serving St Albans, Harpenden & Hertfordshire to make fitness accessible.
Professional, Fun & Results-Driven – I make sure every session is effective and enjoyable.
Nutrition & Lifestyle Coaching – Get expert diet and nutrition advice. No ‘one-size-fits-all’ programs
Proven Results – See success stories from satisfied clients
Let’s build a stronger, healthier you! Book a consultation today!
let's take the first step toward your fitness journey today!
Call me on 07590 830263 for a chat, email me or enquire online
Before becoming a Personal Trainer, I spent over 10 years in the financial services industry in London, but fitness has always been my true passion. Now, I dedicate my career to helping people transform their health and fitness with personalised training programs designed for long-term success.
My Qualifications & Certifications
I believe in continuous learning to provide the best training methods for my clients. Here are my professional qualifications:
Level 4 Physical Activity and Lifestyle Strategies for Managing Low Back Pain (accredited by Active IQ)
Level 3 Certificate in Personal Training (accredited by Active IQ)
Behaviour Change Specialist (accredited by NASM)
Practical Pilates
(accredited by AFAA)
SAQ - Speed Agility & Quickness
(accredited by NASM)
Integrated Balance Training (accredited by NASM)
Pre & Post Natal
(accredited by Active IQ)
Level 3 Diploma in Exercise Referral
Kettlebell Training Instructor
ViPR Instructor
Nutritional Advice for Physical Activity Certificate
Emergency First Aid Certificate
Got more questions?
Let’s talk! Whether you need weight loss guidance, strength training, or just a fitness boost, we’re here to help. Contact us today for a no obligation chat about your goals and how JSM Fitness can support you.
Call Now or Enquire Online!
Official coach for Rennie Grove Biggest Loser
Former Land Coach for the Harpenden Swimming Club
Member of "The Register of Exercise Professionals" REPs: R0097796