Our Mission
Extreme Training partners with top-tier training systems—StrongFirst, Flexible Steel, and more—to deliver live, in-person certification events that transform how you move, train, and teach. We serve coaches, athletes, and everyday individuals who want more than instruction—they want impact. Our events are designed to push limits, sharpen skills, and elevate both your performance and mindset.
The Journey to Flexible Steel
Inspired by Pavel Tsatsouline’s words, “strength that does not reach is wasted… weak,” Jon developed Flexible Steel to build both strength and range. Drawing from Pavel, FMS, martial arts, and performance science, his system delivers fast, visible results and a framework for teaching that works for anybody.
Meet Your Founder

Jon Engum
Jon is a peerless teacher and martial arts grandmaster. An 8th Dan Kukkiwon Taekwondo Grandmaster, he also holds Master-level black belts in Hapkido and Kumdo. Jon is a StrongFirst Certified Master Instructor, teaching globally and hosting kettlebell, barbell, and bodyweight certifications. He’s also the founder of Flexible Steel—a system fusing martial arts flexibility, kettlebell strength, and modern movement science into one powerful platform.
Why Choose Extreme Training?
- Elite Standards: Built on decades of high-level training and global recognition.
- Proven Systems: Backed by StrongFirst, Flexible Steel, and other top-tier organizations.
- Real Transformation: Our events change the way you train—and who you are.