JMK Fitness, LLC

Meet Jeannette Margaret Koene

Owner & Founder, JMK Fitness
Personal Trainer | Nurse Practitioner | Professional Bodybuilder

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A Lifetime of Strength. A Journey of Transformation. A Passion for Helping Others.

 

For Jeannette Margaret Koene, fitness isn't simply a profession — it's a lifelong passion rooted in family, perseverance, and personal transformation.

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Long before she could walk, Jeannette was immersed in gym culture. Her mother, Fran, was among New Jersey's pioneering female bodybuilders, and some of Jeannette's earliest memories involve sitting in a stroller alongside gym equipment, surrounded by individuals dedicated to building stronger, healthier bodies.

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Growing up, athletics came naturally. Throughout her school years, Jeannette participated in dance, gymnastics, cheerleading, and soccer. Fitness was part of her identity — until life took an unexpected turn.

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From Fit to Fat — and Finding Her Way Back

 

Like many young adults, Jeannette encountered personal challenges that dramatically changed her relationship with health and fitness. By age 23, she had reached her highest weight of 226 pounds and was struggling with depression, low self-esteem, and a loss of confidence.

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"Not only was I unhealthy, but I was deeply depressed. I couldn't believe how quickly I went from being a high school athlete to a sedentary adult."

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Determined to reclaim her health, Jeannette returned to the same gym where her mother had once trained. Although she began experiencing physical improvements, the emotional challenges proved equally difficult.

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Overhearing others comment on her weight gain — and express disbelief that she was Fran's daughter — left a lasting impression.

 

"I was devastated. That was the moment I decided I wanted to help people lose weight and feel confident at every stage of their journey."

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What began as a deeply personal struggle became the foundation of her professional mission: to create an environment where people feel supported, respected, and empowered — never intimidated or judged.

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Turning Personal Experience Into Professional Purpose

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In 2006, Jeannette earned her Personal Training Certification and began her career in traditional fitness facilities. Recognizing that conventional gyms weren't comfortable or accessible for everyone, she expanded her approach beyond the gym floor.

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Her training programs evolved to include in-home and workplace personal training, community boot camps, cardio kickboxing, walk-to-run programs, and individualized fitness coaching.

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Her philosophy was simple: fitness should meet people where they are, not where someone else thinks they should be.

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"Everyone deserves access to fitness in a safe, encouraging space. No one should ever feel ashamed for wanting to get healthy."

 

After losing more than 100 pounds, Jeannette discovered a renewed passion for athletic challenges. She embraced running, obstacle course races, charity events, and marathons before eventually stepping onto the competitive bodybuilding stage.

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Competing in Figure and Fitness divisions throughout New Jersey, New York, and Pennsylvania, she developed an even deeper appreciation for the discipline, consistency, and mental resilience required to transform the human body.

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In 2010, Jeannette stepped away from professional competition, but her commitment to health and fitness never wavered.

 

Redefining Strength in Her Forties

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In 2022, another cancer scare challenged Jeannette to reevaluate her health, priorities, and personal goals.

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As she navigated cancer and its challenges, she recognized something familiar in her own thinking.

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"My excuses for being 'too old' or 'too busy' sounded exactly like the ones my clients were using. I knew I had to lead by example."

 

Rather than allowing age, illness, or life's demands to define her limitations, Jeannette returned to the fundamentals of training while embracing new approaches suited to her changing body.

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She focused on building sustainable strength, improving mobility, supporting recovery, and developing a healthier relationship with the aging process.

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The results extended far beyond physical appearance. She emerged stronger, more confident, and more connected to her body than she had been in her twenties.

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After a twelve-year hiatus, Jeannette had her professional bodybuilding status reinstated and returned to competition — cancer-free — sharing the stage with women half her age.

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Her comeback reinforced the message she shares with every client: your age, your past, and your setbacks do not have to determine your future.

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Where Healthcare Expertise Meets Fitness

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What distinguishes Jeannette's approach is her combination of personal experience, clinical knowledge, and extensive fitness education.

 

In addition to being a professional bodybuilder and multi-certified personal trainer, Jeannette is a Nurse Practitioner with a postgraduate degree in Healthcare Management.

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Her advanced training and certifications span:

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• Personal training and group fitness

• Nutrition and weight management

• Functional flexibility and stretch therapy

• Injury prevention and corrective exercise

• Pre-surgical and rehabilitative exercise

• Cancer exercise programming

• Health and wellness coaching

 

She also offers lifestyle genetic testing, food sensitivity screening, and gut health assessments as part of her broader wellness services.

 

By combining healthcare knowledge with individualized exercise programming, Jeannette takes a comprehensive, whole-body approach to fitness — recognizing that every client's health history, physical abilities, lifestyle, and personal goals are unique.

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The Heart Behind JMK Fitness

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JMK Fitness was built on the belief that lasting transformation requires more than exercise. It requires trust, education, accountability, consistency, and a supportive relationship between trainer and client.

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Whether working with someone beginning their fitness journey, rebuilding strength after an injury, navigating age-related physical changes, or pursuing a new athletic goal, Jeannette brings the same dedication and compassion to every session.

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Her own experiences have shaped a coaching philosophy that values progress over perfection, strength over appearance, and long-term wellness over temporary results.

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"My fit-to-fat-to-fit journey — and everything in between — is something I share to remind people they're not alone. I understand body image struggles, setbacks, and starting over. I've seen every fad, and I know nothing worth having comes easy. But if you're ready to put in the work, I can give you the tools to change your life."

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JMK Fitness — Motivating Clients Every Step of the Way Since 2010.