Pure Mettle Strength & Conditioning

14/04/2026

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06/04/2026

BREATHING & POSTURE – THE BIOMECHANICS OF THE DIAPHRAGM AND SPINE

Breathing is not just a respiratory act—it is a biomechanical event that directly influences posture, spinal alignment, and core stability. The diaphragm plays a central role in this system, functioning as both a primary breathing muscle and a key stabilizer of the trunk.

In an optimal posture, the diaphragm maintains a dome-shaped structure. During inhalation, it contracts and moves downward, increasing thoracic cavity volume while reducing internal pressure. This allows air to flow into the lungs. Simultaneously, the rib cage expands outward and upward, and intra-abdominal pressure is regulated to support spinal stability. This coordinated action creates a balance between mobility and control.

The bell jar model shown here simplifies this concept. When the diaphragm moves downward (like pulling the base of the jar), volume increases and pressure decreases, allowing the “lungs” to inflate. Conversely, when the diaphragm relaxes and moves upward, volume decreases and pressure increases, pushing air out. This pressure-volume relationship is fundamental to efficient breathing mechanics.

However, posture significantly alters this system. In a slouched or kyphotic posture, the diaphragm becomes flattened and loses its mechanical advantage. The rib cage collapses, limiting expansion, and breathing shifts toward accessory muscles such as the neck and upper chest. This not only reduces respiratory efficiency but also increases tension in the cervical and thoracic regions.

Spinal alignment also affects force transmission. Excessive lumbar extension or anterior pelvic tilt can disrupt the diaphragm’s ability to generate proper intra-abdominal pressure, reducing core stability. On the other hand, a neutral spine allows the diaphragm, pelvic floor, and abdominal muscles to work synergistically as a pressure system, enhancing both breathing and postural control.

From a biomechanical perspective, breathing and posture are deeply interconnected. Changes in spinal curvature alter diaphragm positioning, which in turn affects pressure regulation, muscle activation, and overall movement efficiency.

Ultimately, efficient breathing requires optimal alignment. Restoring diaphragmatic function and maintaining proper posture not only improves oxygen exchange but also enhances stability, reduces strain, and supports overall biomechanical health.

05/04/2026

27/03/2026

The most beautiful of Strongman send-offs yesterday for our fallen Viking Warrior .ch 💪🏼👌🏼🫶🏼

Stand down Soldier. Your work is done.
Rest easy Huddo. Your name, your guts, your glory and your indomitable will shall live on in the and hearts forever, and no doubt the entire Strongman World. ✨💫🌟

🙏❤️🫡⚔️🛡️

14/03/2026

The Australian Strongman world has lost an absolute hero and legend.

Gone way too soon .ch

Thankyou for all of the inspiration, guts, defiance, humility and friendship you brought into the SM world.

Your legacy will live on.

08/03/2026

strongman

08/03/2026

Happy International Women’s Day!
Here’s to all the strong and phenomenal women in our lives!

May we know them.
May we be them.
May we support them.
May we raise them.

💖⚔️🛡️💃🏼🫶🏼💪🏼🤩🔥

07/03/2026

GET AFTER IT LADIES!!!

Allira Joy 🔥🫶🏼💪🏼🤩🧡🥷

TEAM AUSTRALIA AT THE ARNOLDS 💪

Six of Australia’s strongest women are currently competing at the Arnold Strongwoman Classic in Columbus, Ohio.

Good luck to:
🏋️‍♀️ Allira Joy
🏋️‍♀️ Elly Latemore
🏋️‍♀️ Katie Blunden
🏋️‍♀️ Kirsten MacDonald
🏋️‍♀️ Sarah Rodwell
🏋️‍♀️ Sez Eldridge

We’re incredibly proud to see Australian strongwomen represented on one of the biggest stages in the sport.

Lift big and make Australia proud!