Redefining Strength Isn’t Just a Name. It’s a Mission.

I’m Cori Lefkowith, founder of Redefining Strength

Since 2014, we’ve helped thousands of women… most over 40… feel strong, capable, and finally in control of their bodies.

Our approach is simple: we meet you where you are, build a plan around your real life, and coach you through every step… with no fluff, no guilt, and no guessing.

Every workout, every nutrition tweak, every mindset shift is designed to fit YOU. Real transformation isn’t about following a program. It’s about building one that fits.

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How Redefining Strength Was Born

Our Orgin Story…

Redefining Strength started off as a training studio in Costa Mesa, California. What began as a local gym has grown into a global online coaching program… helping thousands of women reclaim their confidence and strength.

We specialize in coaching women 40+ who:

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Want to feel strong in their bodies again

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Are done with yo-yo diets and quick fixes

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Want to lift without fear of getting hurt

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Care more about longevity than a 6-pack (Not that you can’t have both 😉)

FROM FRUSTRATED TO FOCUSED

Learn From My Mistakes

I didn’t start Redefining Strength because I got it all right. I started it because I got it all wrong. I jumped between diets. I crushed myself in workouts. I followed every “fit tip” I could find… and still felt stuck. Eventually, I stopped chasing the next plan… and started creating the one I actually needed.

One built on science. One that adapted to real life. One that made me feel strong, not broken.

-Cori Lefkowith

What We Stand For

We’re not here to fix you… because you’re not broken.

We don’t do “cookie-cutter.” We don’t believe in extremes. And we definitely don’t believe in shrinking yourself for anyone. We’re here to guide you back to the strongest version of yourself. We believe…

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Strength is built, not given

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Education is empowerment

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You shouldn’t have to choose between health and your lifestyle

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Real change is about consistency not perfection

What We Stand For

We’re not here to fix you… because you’re not broken.

We don’t do “cookie-cutter.” We don’t believe in extremes. And we definitely don’t believe in shrinking yourself for anyone. We’re here to guide you back to the strongest version of yourself. We believe…

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Strength is built, not given

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Education is empowerment

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You shouldn’t have to choose between health and your lifestyle

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Real change is about consistency not perfection

History Of Redefining Strength

In a nutshell:

After competing as a Division I tennis player and winning the Rhode Island/Massachusetts state powerlifting championship, I got my start in the fitness industry at the front desk of a gym. I worked my way up to coaching personal training and group fitness classes…and that’s when the idea for Redefining Strength was born. What started as a vision to create something different has since become our team’s mission: to redefine what transformation really means and help more people feel strong, confident, and in control.

2014: Gym Opens

We opened our first brick-and-mortar gym in Costa Mesa, California, focused on strength training and personalized fitness.

2015: First Digital Programs Released

To meet growing demand, we introduced our first online training programs...bringing our proven methods to clients across the country. This evolved into our our world class 1:1 remote coaching program.

2016: Redefining Strength Podcast Launches

We started the Redefining Strength Podcast to share practical fitness and nutrition tips, expert interviews, and real talk about transformation. It is still going strong today with millions of downloads.

2017: First Book Published

Cori publishes her first book The Macro Hacks, expanding the reach of the RS message and offering a deeper dive into nutrition strategies.

2018: Strong Smart Certification Launched

We introduced the Strong Smart Certification...our in-house credential for fitness professionals. Accredited by leading organizations like NASM, AFAA, ACE, and ISSA, it’s now used by trainers worldwide for continuing education.

2019: YouTube Channel Hits 100K Subscribers

The RS YouTube channel gains major traction, becoming a trusted source for evidence-based fitness education and tips. It currently has over 880k subscribers and over 110 million views.

2020: Named Best Online Home Training Program by The Guardian

With the whole world stuck in lockdown our coaching method receives international recognition during the pandemic for being one of the top 10 home fitness programs.

2021: Upgraded Gym Opens

We open a new training facility geared toward in person events for our online clients.

2022: Coaching Team Expands

We grow our team of experts to include RDs and other high-level professionals to provide deeper support and specialized care.

2023: Back to back years on the INC 5000 Fastest Growing Companies List

Redefining Strength is named one of the fastest-growing private companies in the U.S. for the second year in a row...one of only 14 companies to earn repeat honors. It’s all thanks to our clients’ incredible results and the coaching experience we’ve built to support them.

2024: First Mexico Retreat

We hosted our first Mexico retreat an immersive experience for clients to reconnect with themselves, their goals, and each other in a powerful destination setting.

2025: Book Deal Signed with Victory Belt Publishing

Our proven coaching method, The Strong System, is getting published. In 2025, Cori signed a deal with Victory Belt Publishing, known for producing New York Times bestsellers in the health space, to bring our signature framework to the world. It's set to release in January 2026.

What Sets Our Team Apart?

A True 1:1 Personalized Experience

Your coaching experience should be as personalized and high-level as your goals. That’s why we don’t just hire certified coaches… we build a team of credentialed experts with real-world experience. When you join our program, we match you with a coach who specializes in what you’re looking to accomplish. You also have access to our Registered Dietitians and a diverse team of professionals including. Some of our team members include

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Registered Dietitians who provide science-based nutrition plans tailored to your body, lifestyle, and goals.

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Doctorates in Kinesiology and Physical Therapy guiding your training with advanced knowledge of human movement and recovery.

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Certified Strength & Conditioning Specialists, Corrective Exercise Specialists, and Functional Fitness Coaches to help you train smart, not just hard.

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Mindset and Behavior Change Experts to ensure your transformation is sustainable from the inside out.

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Coaches with specialized experience in menopause, injury recovery, plant-based nutrition, endurance training, and more.

What ties us together isn’t just knowledge…it’s the way we care. Every client is treated like our only client.

Meet The Whole Team

Ready to FIND YOUR STRONG?

You’re not too old. It’s not too late. And you don’t have to do this alone.

We’re here to help you build strength that lasts…inside and out.

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