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Train Smarter. Move Better. Lead with Confidence.
Dragon Door’s in-person and online workshops help you build real strength, improve movement, and elevate your coaching. From the HKC Certification to the world-renowned RKC certification—the original Russian kettlebell certification—and the Progressive Calisthenics Certification (PCC), our programs deliver expert instruction and proven systems to help you grow. Whether you're preparing for an RKC certification test or exploring advanced Russian kettlebell training, you'll gain the skills and confidence to lead with authority.

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RKC Certification Workshops Dragon Door

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RKC Online Recertification Dragon Door

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RKC-II Certification Workshops Dragon Door

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RKC Re-Certification Workshops Dragon Door

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RKC-II Online Recertification Dragon Door

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RKC II Re-Certification Workshops Dragon Door

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HKC Online Recertification Dragon Door

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HKC Re-Certification Workshops Dragon Door

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HKC Certification Workshops Dragon Door

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What Real Users Have To Say

“Having been a Strength and Conditioning Coach for 40 years (33 years at the college level, 7 years at the high school level), I have seen a LOT of devices come and go. The IsoMax impresses me so much that I would definitely incorporate it into my program if I were starting all over again in my career. It'll defin… Read More

Rod Cole

Stephenville, TX

“Been working out since 1975. The Isomax has taken center stage. The combination of convenient, very effective isometrics and seeing the amount of force generated on each rep is phenomenal. Dragon Door's innovations are a godsend. I'm 70 and the strongest I have ever been.”

Bob Lorenz

Vernon, NY

“I have been able to gain more muscle mass and increased strength with the Isomax than with any free weights or weight machine. I am in my mid 40s and have been lifting weights since my late teenage years, but nothing I have tried compares to the Isomax!”

Mike Little

Lansing, NC

Excellent Isometric Trainer. Additional training technique to weights. Exercises your muscles differently than normal weights. For those people like me who have never trained isometrically they stimulate your muscles without risk of injury. Isometrics strengthens muscle strength / endurance in different ways to w… Read More

Tommy Cusack

London, England

I love my IsoMax. I am 55, I had the normal aches and pains you would expect for someone my age. Back, knee and tricep tendonitis. I have been using the IsoMax for 4 months, my aches and pains have faded to nothing. My blood pressure has also improved and i have effortlessly gained muscle. And i am only using it … Read More

Stu W.

Long Island, NY

Kettlebell Get-ups at an RKC workshop with Andrea Du Cane instructing

RKC Big Six Workout

big six Andrea Du Cane Jan 18, 2024

William Sturgeon, RKC Team Leader performing a kettlebell swing

The Kettlebell Swing & Low Back Pain

Category_Kettlebell Training William Sturgeon Oct 29, 2023

Better Balance with Kettlebell Exercise - article lead image with multiple cropped examples of the exercises described in the article.

Key Kettlebell Exercises To Help You Create Better Balance

balance training William Sturgeon Feb 20, 2023

Top notch product as always

Top notch product as always. Still holding my Russian reds.Yeah buddy!

It is a game changer for me

It is a game changer for me. It gave increditble feedback on the weights and duration. This kind of feedback is encouraging for setting goals in your strengh out put. Awesome. Bruce Lee would approve if he had this kind of feed back in his training.

a definite buy for bodyweight enthusiasts

excellent info with progressions;great photos

This 24kg is my 7th kettlebell from DD and it didn't disappoint

This 24kg is my 7th kettlebell from DD and it didn't disappoint. Same great finish, feel, balance, and inspiration to use as the previous 6.

I like the workouts But it would have been

I like the workouts
But it would have been great if they was on DVDs

Workshops

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What Real Users Have To Say

Blog posts

RKC Big Six Workout

The Kettlebell Swing & Low Back Pain

Key Kettlebell Exercises To Help You Create Better Balance

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