Strength Training

How to Boost Growth Hormone, Strength Levels and Muscle Size Without Heavy Weights

Jon Bruney, author of Neuro-Mass and The Neuro-Grip Challenge May 31, 2025

Occlusion is more commonly known as Blood Flow Restriction (BFR) training. Restricting blood flow during exercise may seem counterintuitive to most trainees. In fact, many athletes take pre-workout su… Read more

How to Boost Growth Hormone, Strength Levels and Muscle Size Without Heavy Weights

Jon Bruney, author of Neuro-Mass and The Neuro-Grip Challenge May 31, 2025

TRUE Strength: How To Develop Strength That Transcends The Gym

Zach Even-Esh May 31, 2025

How Zach Even-Esch, author of The Encyclopedia of Underground Strength and Conditioning. endured the devastating destruction of Hurricane Sandy when it pummeled his beloved New Jersey… Read more

Build Your Strengths and Weaknesses with the Isochain

Mental Muscle Logan Christopher May 31, 2025

Overall, the Isochain is simple to get up and running with. That being said I did feel like it took about two weeks until my body was really in the groove with most of the exercises and different posi… Read more

HYBRID STRENGTH TRAINING Q & A Part I — The TOP 5 Questions

Danny Kavadlo May 31, 2025

Dragon Door and I recently hosted a live Q & A Session in the Hybrid Strength Training Users Group on Facebook. Many excellent questions - and surprising answers - were raised. Read more

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What Real Users of The IsoMax 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

Clear video

Clear video, but nothing new compared to the texbook

The Sequel is as good as the original!

This is a great book for getting and keeping yourself srong!This is my 'bible' for calisthenics training. Thanks Coach!

excellent

It was a good live review of the pushup chapter from the book

It was a good live review of the pushup chapter from the book. But it unintentionally (I think,) accented the importance of using a slow with the exercise. Gong down on a two second pace, pausing one second at the bottom, and then rising on a two count, ads tremendous value to the exercise. When I did the book course originally, I topped out before getting to the one handed push up. I suspect that, given recent gains, that should be able the master the one armed push up this time around while using this cadence.

Exceptional video

This is an outstanding video, very well produced and the explanations are clear. I highly recommend this, it’s inspirational.

Strength Training

How to Boost Growth Hormone, Strength Levels and Muscle Size Without Heavy Weights

How to Boost Growth Hormone, Strength Levels and Muscle Size Without Heavy Weights

TRUE Strength: How To Develop Strength That Transcends The Gym

Build Your Strengths and Weaknesses with the Isochain

HYBRID STRENGTH TRAINING Q & A Part I — The TOP 5 Questions

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What Real Users of The IsoMax Have to Say

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