IRON UNIVERSITY

11/29/2025

11/25/2025

⚡️The Power Arc is back. Designed for precise hip positioning and consistent glute loading, the Power Arc is now restocked — and for Black Friday you get 10% OFF with code BLACKFRIDAY.

💥 Last run sold out fast.
👉 This shipment is limited.
⚠️If you want guaranteed access, now is the time.

In stock. Ready to ship.
🔗 https://swiy.co/PWBF

10/05/2025

To the biomechanically literate coach, it’s evident that the pelvis is rotating posteriorly around fixed femurs, maintaining hip flexion rather than producing extension.
(REFERENCE https://www.researchgate.net/publication/370634997_Spinopelvic_challenges_in_primary_total_hip_arthroplasty/fulltext/645b972a6090c43d0f5e877c/Spinopelvic-challenges-in-primary-total-hip-arthroplasty.pdf?_tp=eyJjb250ZXh0Ijp7ImZpcnN0UGFnZSI6Il9kaXJlY3QiLCJwYWdlIjoicHVibGljYXRpb24iLCJwcmV2aW91c1BhZ2UiOiJfZGlyZWN0In19 )

For the biomechanically informed reader, this motion represents pelvic rotation relative to a fixed femur, not true femur-on-pelvis extension.

For the biomechanically aware practitioner, this pattern reveals that posterior pelvic tilt during a hip thrust does not constitute hip extension — it’s a compensatory motion linked to the limits of hip flexion.

Your pelvis (The bone structure that connects your spine to your legs) IS rolling backward.
your thigh bones ARENT moving backward.

That rolling motion is called a posterior pelvic tilt, and it usually happens when your hips are already bent
(THE START OF A HIP THRUST) and can’t bend much more.
-When you sit
-BOTTOM OF A SQUAT (BUTT WINK)

So instead of your hips truly extending, your pelvis is just tucking under to finish the movement.
This is the same type of motion your body does when you go from standing to sitting — your pelvis rolls back to help you bend more.

In other words:
The hip thrust doesn’t make your hips extend (femurs move posteriorly) — it makes your pelvis roll backward, which actually keeps you in a HIP flexed position.

posterior pelvic tilts is at the top of the hip thrust— YES,
BY STARTING IT AT the bottom and completING it at the top of the hip thrust

That’s why mechanically and scientifically the hip thrust is a pelvic movement, not a true hip extension movement

09/13/2025

Truth and Science are not the same thing.

09/11/2025

Bridge Trilogy
• Netto, A. S. et al. (2019). Comparison of gluteus maximus and hamstring activation during conventional and hip thrust exercises: A 3D motion analysis with force plates. Journal of Electromyography and Kinesiology.
• Brazil, A. et al. (2021). Kinetic and kinematic comparison of barbell hip thrust and barbell back squat. Journal of Strength and Conditioning Research.
• Colonna, M. et al. (2025). Biomechanics of supine bridge variations: A systematic review. Frontiers in Sports and Active Living.
• Hip Thrust Comprehensive Modeling
• Vigotsky, A. et al. (2022). A comprehensive analysis of barbell hip thrust mechanics using 3D modeling and inverse dynamics. PeerJ.
• RCT: Squat vs. Hip Thrust
• Plotkin, D. L. et al. (2023). Barbell hip thrusts and back squats similarly increase gluteal muscle hypertrophy and strength in untrained women. Sports Medicine.
• EMG Limitations
• Vigotsky, A. et al. (2018). Interpreting signal amplitudes in surface EMG studies: A cautionary note. European Journal of Applied Physiology.
• Physics Foundations
• Newton, I. (1687). Philosophiæ Naturalis Principia Mathematica (Newton’s Third Law: action–reaction).
• Halliday, D., Resnick, R., & Walker, J. (2013). Fundamentals of Physics (10th ed.). Wiley.

08/07/2025

“TRUE” HIP EXTENSION DEFINITIONS

08/07/2025

08/01/2025

LETS GO!!!!!!!!

07/31/2025

🍩📐⏳🌎

07/26/2025

07/24/2025

🦐

07/21/2025

Live by that and you’ll be safe in your waist and glute gains