About
Hi, I’m David Kull, a NASM-certified personal trainer and founder of Defying Age Fitness.
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​At 60, I understand the challenges of maintaining strength, mobility, and energy as we age -- because I live them, too. And I know how intimidating the fitness world can feel when it seems built for people half our age.
That’s why I started Defying Age Fitness: to create a safe, supportive space where adults 60+ can rediscover the freedom to move with confidence, through personalized, safe, and effective training, without feeling judged, rushed, or overwhelmed.
Whether you’re looking to regain balance, build endurance, or simply feel more capable day-to-day, this is where your stronger chapter begins.
Maybe you’re getting back into exercise, or you’ve been active for years. Either way, you’ll find training here that respects your body — and challenges it in all the right ways.
Why I Built This Program
Because Your Health Is Too Important — and Traditional Fitness Ignores People Our Age
Most fitness programs are not designed for older adults. They move too fast, push too hard, and skip the essentials: mobility, stability, balance, posture, and joint protection.
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I built Defying Age Fitness because people in their 60s, 70s, and beyond deserve training that is:
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Safe and joint-friendly
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Clear and beginner-friendly
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Progressive and adaptable
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Focused on living better — not just working out
This isn’t about looking like you did at 30.
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It’s about moving freely, living fully, and feeling proud of your strength — right now.
My Training Approach
Training Designed for Real Life, Not the Gym Floor
My approach blends four essential pillars of age-smart fitness:
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1. Functional Strength
Build the muscles that protect your joints and keep you independent.
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2. Mobility & Flexibility
Reduce stiffness and improve movement so you feel better doing everyday tasks.
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3. Balance & Stability
Lower your risk of falls and move confidently through your day.
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4. Mindset & Consistency
Small steps, taken consistently, lead to meaningful progress.
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I design every program to help you feel capable, steady, and strong — without long, punishing workouts.
Who I Work With
I Specialize in Adults 60+ at All Fitness Levels
I work with older adults who want to:
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Ease stiffness and improve mobility
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Improve posture and balance
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Lose weight safely (optional)
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Feel younger and more confident in their everyday movement
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Stay active for their family, hobbies, and quality of life
If you have limited mobility or prefer chair-based options, you’re included — I offer modifications for every level.
The Programs I Offer
Clear, Supportive Coaching Built for Your Stage of Life
5-Day Kickstart Challenge
A free, beginner-friendly introduction to safe, effective training for adults 60+. Start here.
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Foundations Coaching Program
A 12-week step-by-step strength, mobility, balance, and posture pathway — designed to rebuild total-body confidence.
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Momentum Club
Your ongoing monthly fitness community, with new workouts, accountability, and live support.
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1-on-1 Personal Coaching (Optional)
A customized experience for those wanting personalized guidance and accountability.
My Promise To You
I Will Meet You Exactly Where You Are — And Help You Get Where You Want to Go
You will never be rushed. Never judged.
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Everything we do is designed to protect your joints, build your confidence, and help you move better for the rest of your life.
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If you show up for yourself, I’ll show up with you every step of the way.
Ready to Take the First Step?
Join thousands of older adults who are reclaiming their strength, mobility, and confidence.