Alain Oliva-Diaz

Personal Trainer

Shaping Champions,
Building Strength

Over 30 years of experience training all types of people- from International athletes to the elderly & people with health impairments.

$50 / single session
$400 / 10 sessions

Personal Fitness Session

1:1 personalized instruction
$65 / session
$500 / 10 sessions

Partner Fitness Sessions

1:2 customized sessions
$50 / session
$400 / 10 sessions

Elite Combat Training

Martial Arts, Boxing, or Self-Defense
About Me

Alain Oliva-Diaz:

Athlete, Trainer, Champion


Alain Oliva-Diaz is not just a professional athlete and martial arts expert. He’s a dedicated fitness trainer with over 30 years of education and experience who is passionate about empowering everyone—young, old, experienced, novice, healthy, and those with health conditions—to become the best version of themselves through improving their personal fitness little-by-little.

Born on October 15, 1975, in Cuba, Alain legally moved to the USA in early 2023 with his son. With a rich background as a gym owner, fitness instructor, martial arts champion, internationally renowned trainer, and highly certified expert, he is continuing his mission to shape champions and build strength in Jacksonville, FL.

But what sets Alain apart is not just his impressive accomplishments and rich experience in the world of fitness and martial arts. It’s his dedication to his clients, his ability to adapt to their unique needs and circumstances, and his unwavering belief in their potential.

Whether you’re a young athlete looking to enhance your performance, an elderly individual aiming to maintain mobility, a professional athlete seeking to hone your skills, or someone just starting your fitness journey, Alain is here for you. His approach to fitness is not about being the strongest or the fastest – it’s about being the best version of yourself.

With Alain, everyone is a champion in their own right, no matter where they are on their fitness journey. Come and discover your strength with Alain Oliva Diaz.

Martial Arts and Athletic Achievements:

  • Began his athletic career at the age of six, earning a brown belt in Karate under 5th Dan Sensei Dagoberto Hernandez.
  • Continued his training in Judo, achieving an orange belt under 5th Dan Master Gerardo Verde.
  • Under the guidance of an 8th Dan Grand Master, chief trainer of Cuba’s special forces, earned a black belt (1st Dan).
  • Achieved 1st Dan in Taekwondo WTF and ITF Taekwondo, trained by masters who were special forces trainers.
  • Mastered Chinese and European Sanda, achieving 1st Dan in both lines under 6th Dan Frank Cazón and 7th Dan Roberto Hernandes.
  • In the USA, earned a blue belt in Jiujitsu under 5th Dan William Perez.
  • Gained experience in boxing, Mixed Martial Arts (MMA), and personal defense.

Competitive Achievements:

  • Clinched gold in Cuban national tournaments in Sanda, Jiujitsu, Open (all martial arts styles), and MMA. Also secured silver and bronze in boxing, and bronze in Taekwondo.
  • Achieved gold in international bilateral tournaments against Venezuela, Mexico, Dominican Republic, Italy, Argentina, El Salvador, and Guatemala.
  • In boxing, emerged victorious against competitors from Mexico, Guatemala, Germany, Costa Rica, Ecuador, France, England, Japan, Namibia, Spain, Nicaragua, Honduras, Venezuela, and Colombia.

Military and Civilian Career:

  • Joined the military at 17, graduating as a hand-to-hand combat instructor and physical fitness trainer.
  • Completed a VIP security platoon leader’s course, offering protection to high-profile targets and individuals.
  • Imparted fitness training, personal defense, and combat sports training in civilian life, also working security at local bars and discos during the weekends.



What my clients say

"My name is Saad Mohammed, and I am from Algeria. I trained with Alain Oliva-Diaz for almost two years. He is an excellent trainer who prepared me according to my needs. As a doctor, I need a specific physique, one that is suitable for my specialty. Alain is very punctual and completely dedicated to his work, regardless of the weather or any other conditions. He is capable of modifying your training; even during my exam times and fasting periods, I was still able to see results despite only being able to train three times a week or less. He's a great friend."
Saad Mohammed
Doctor, Algeria
"I am Willem Namboga. I trained in boxing and fitness with Alain Oliva-Diaz. He prepared me for a school boxing competition, and at the same time, I gained muscle mass and improved my strength and capacity. He is an excellent trainer and friend."
Willem Namboga
Boxing Competitor, Cuba
"I had a gym membership but wasn't getting any results because I lacked the guidance from a professional who could create personalized workouts specifically for me. Alain has been a phenomenal trainer- dedicated to my progress and always encouraging. He is a master at his craft and truly gifted in designing workouts that are not too strenuous or too easy. I highly recommend Alain to anyone in the Jacksonville, FL area looking for a world-class fitness journey."
Brian Roes
Business Owner, Jacksonville, FL

Hard work always pays off

With unwavering dedication, Alain is committed to helping people at all stages of their fitness journey achieve their desired results, championing the belief that little by little, great strides are made in their transformation.


Frequently Asked Questions

Discover answers to frequently asked questions about Alain’s approach to fitness and how he can guide you on your journey to becoming a champion.

Absolutely! Alain firmly believes that everyone starts their fitness journey somewhere, and it’s never too late to begin yours. He tailors every training program to meet your unique needs and fitness level, ensuring that you can build strength, endurance, and confidence at a pace that feels right for you. “Little by little” is our mantra, meaning we’ll help you make steady, sustainable progress towards your health and fitness goals.

Alain will meet you at the gym of your choice. Planet Fitness & Bailey’s are popular options in Jacksonville, but if you have another gym you prefer, please let Alain know. If Alain doesn’t have an active membership at the gym you select, you will be responsible for purchasing a guest pass for him for your training session.

Each training session with Alain is designed to be a unique and engaging experience, as we believe in the power of variety for achieving optimal results. You might be doing anything from strength and conditioning work to cardio exercises, barbells or strength training machines, flexibility training, or even functional movements that mimic everyday activities. Rest assured, no two training sessions will be exactly the same. This approach keeps your body guessing, promotes all-round fitness, and helps prevent workout plateau for sustained progress and results.

If you have health conditions, it’s crucial to consult your doctor before starting any new fitness regimen. Once you have your doctor’s approval, Alain will work closely with you to understand your health condition fully and design a safe, effective training program that respects your limitations and needs. Communication is key – the more Alain knows about your health, the better he can tailor your workouts to help you improve your fitness without compromising your wellbeing. Remember, Alain’s ultimate goal is to help you get stronger and healthier, little by little, at a pace that suits you.

We understand that sometimes life gets in the way and you might need to cancel or reschedule your training session. To do so, we kindly ask for a minimum of 24 hours’ notice. This allows us to adjust our schedule and offer your time slot to another client. Regrettably, without the required notice, we cannot provide a refund for the session. We appreciate your understanding and cooperation on this matter.

We understand that health comes first and sometimes illness is unavoidable. If you’re sick and unable to attend your scheduled training session, we can provide a refund or reschedule your session. However, we do require a note from your doctor to validate your health condition. This policy ensures fairness to all our clients while prioritizing your wellbeing. We hope you understand and appreciate your cooperation. Get well soon and we look forward to seeing you back in good health!

Alain Oliva-Diaz brings a wealth of qualifications to his fitness and martial arts instruction. His professional journey is backed by multiple certifications and recognitions:

  1. He started his athletic career at age 6, studying Karate and earning a brown belt under 5th Dan Sensei Dagoberto Hernandez.
  2. He trained in Judo under Master Gerardo Verde and later with a renowned 8th Dan Grand Master, earning a black belt (1st Dan).
  3. He has trained in both WTF and ITF styles of Taekwondo under distinguished masters, earning 1st Dan in both styles.
  4. He has studied Sanda under both Chinese and European lineages, earning a 1st Dan (Chien) under each discipline.
  5. He holds a blue belt in Brazilian Jiu-Jitsu under Master William Perez.
  6. In addition to his martial arts training, Alain has experience in boxing and Mixed Martial Arts.
  7. On the competitive front, he has achieved national and international recognition in Taekwondo, Boxing, Sanda, Jiu-Jitsu, and MMA.
  8. Outside of his athletic career, Alain served in the military and graduated as an instructor of hand-to-hand combat and physical training.
  9. In his civilian life, he has imparted fitness training, personal defense, combat sports, and physical preparation for numerous clients.

With his vast experience and knowledge, Alain is well-equipped to guide clients on their fitness journey, regardless of their starting point or fitness goals.

Comfortable athletic wear and a sturdy pair of sneakers are usually sufficient for our training sessions. If any special equipment is required, Alain will inform you in advance.

Absolutely! Alain offers both private one-on-one sessions and partner classes. The best option depends on your personal goals and comfort level. For group classes, contact Alain to discuss rate, group size, and frequency.

At this time Alain does not offer online or virtual training programs. Your personal safety is top priority, so it’s crucial he is with you in person to monitor your form, recovery, and level of exertion.

While Alain is primarily a fitness and martial arts instructor, he understands the importance of nutrition in achieving fitness goals. He can provide general nutritional advice and, if necessary, refer you to a qualified nutritionist for detailed meal plans.

Each training session typically lasts for about an hour, but this can vary based on the specific workout plan and individual needs.

The frequency of the sessions is entirely flexible and can be adjusted based on your needs, goals, and availability. Alain will work with you to determine the optimal training frequency for you.

Alain’s training programs are open to adults of all ages, starting from 18 years old. He also enjoys working with seniors, helping them maintain strength, balance, and mobility. No matter your age, Alain is committed to assisting you on your fitness journey.

Safety is a top priority for Alain. All workouts are designed with careful attention to proper form and technique to minimize the risk of injury. Warm-ups and cool-downs are included in every session, and Alain continuously monitors you during training to ensure exercises are performed correctly. If at any point you need to stop the workout or request a modification, Alain will be supportive and happy to adjust.


Book a Session

Contact us now to take that first exciting step toward a stronger, healthier, and more confident you. Alain is ready to guide you every step of the way.

Remember, every champion was once a beginner. Let’s start your journey today!


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(English or Spanish)

(786) 759-4281