Heal Your Body. Transform Your life.
My name is Petra , and helping people live healthier, stronger, and happier lives has been my passion for over 30 years.
Throughout my career, I’ve worked with people of all ages and abilities—from professional athletes to children, seniors, and individuals navigating injuries, surgeries, chronic conditions, or physical limitations. Whether the goal is weight loss, muscle building, rehabilitation, improved conditioning, or simply feeling better in your body, my approach is always personal, thoughtful, and health-first.
I strongly believe in one-on-one, human-centered training and guidance. While apps and AI programs have their place, they often miss what truly matters: proper form, individual limitations, emotional awareness, and real-time adjustments. This is where many injuries happen—and exactly where my work makes the greatest difference. My priority has always been long-term health, safety, and sustainability, not quick fixes.
For over 20 years, I’ve proudly served the South Florida community, working with clients in Boca Raton, Highland Beach, Delray Beach, and Deerfield Beach. My clients aren’t just numbers or programs—they’re people with unique bodies, histories, and goals, and I treat them as such.
In recent years, my work has expanded beyond humans to include what matters just as deeply to many of us: our pets. I now offer nutrition and holistic wellness guidance for dogs, helping pet parents support their furry family members with more conscious, health-focused care.
Everything I offer—whether for you or your pet—is guided by experience, intuition, and genuine care. This is not a trend or a template. It’s a lifetime of dedication to well-being.
If you’re looking for personalized support, integrity, and someone who truly listens, you’re in the right place.
My Services
You can have RESULTS or EXCUSES not Both!
Published in “Simply The Best “ magazine.
Personal Training (All Ages)
I offer individualized one-on-one training for every age and fitness level. Each session is tailored to your needs, focusing on strength, alignment, mobility, posture, and nervous-system balance. My goal is to help your body feel strong, healthy, and pain-free.
Rehabilitation & Recovery
Specialized support for clients healing from injuries or surgeries, including:
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Hip replacement
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Joint surgeries
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Muscular imbalance
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Chronic pain
I help restore movement, rebuild strength, and support a faster, safer recovery.
Plant-Based & Vegan Nutrition
I design natural nutrition plans focused on:
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Cellular regeneration
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Detoxification
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Hormonal balance
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Anti-inflammatory living
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Weight loss or recomposition
No supplements, no diets — just whole, fresh, real food designed for your healing.
Holistic Nutrition Counseling
For those who want to transition into a healthier lifestyle.
This includes:
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Daily food structure
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Simple meal plans
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Grocery guidance
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Support for emotional eating
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Education on natural healing through food
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Pet Nutrition & Natural Health Guidance
I also help pet owners create fresh, homemade food plans for their dogs and cats to support:
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Longevity
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Immunity
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Dental health
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Allergy reduction
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Reduced need for medications
Including gentle homeopathic guidance for common pet issues.
I don’t just help people — I also support the health of their pets.
If you’re a dog or cat owner, I can help you design a personalized, natural nutrition plan for your animal, using fresh, species-appropriate food, herbs, and gentle homeopathic support.
Animals thrive when we feed them real, whole food and care for them with natural remedies that support their body’s intelligence. My approach focuses on prevention, vitality, and strengthening the immune system through nutrition and lifestyle — not unnecessary chemicals or over-medicating.
If you want your pet to live longer, healthier, and more naturally — I’m here to guide you with the same holistic principles I use for humans: nourishment, balance, intuition, and pure, living food.
#1 Rated Personal Training
in South Florida
Petra Mertl, the founder of Body By Petra LLC, takes her pride in providing the best personal training services which include life coaching, nutrition guidance, and mentoring.
With degree in psychology and as a Tony Robbins certified RMT coach and with her 20 years of experience as a personal trainer, nutritionist, coach and mentor, Petra’s goal is to provide all inclusive personal training professional services to help everyone accomplish their fitness and health goals to live happy and healthy.
TESTIMONIALS
Oh my goodness I can’t thank you enough...u truly have not only changed my body but how I eat feel about myself and my confidence..Petra u were my angel when I needed one so bad ...thank you thank you 🙏🏻...I lost some weight and gained an amazing friend 🤗....few more lbs to go but I could have never done this w out 🥰
Summer
Alexandra
Leighton Wella, the army veteran
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SCHEDULE FREE EVALUATION
We will customize your workout and diet program based on your goal, health and lifestyle help you to achieve your wellness and health.
