In this free guide of the Omniathlete Guides Series you will learn:

• • Trunk Function & Movement

  • How the trunk contributes to force transmission, postural orientation, and elastic energy storage.

  • Why variability is a resource, not a flaw, in trunk behaviour.

  • How the trunk adapts to fatigue, intent, and context.

​

• • The Omniathlete Three‑Pillar Framework

  • Our own approach to trunk training involving the three pillar of trunk strength, stiffness modulation, and lumbopelvic control

  • Trunk Strength — load tolerance, anti‑movement capacity, force transmission.

  • Stiffness Modulation — timing, reactivity, elastic contribution, perturbation response.

  • Lumbopelvic Control — segment coordination, pelvic alignment, rotational sequencing.

​

• • Anatomy Through a Systems Lens

  • The interaction of the passive, active, and neural subsystems.

  • Functional roles of global force producers, local force modulators, and coupling structures like the thoracolumbar fascia.

  • How the nervous system governs trunk behaviour through feed‑forward and feedback control.

​

• • Training Applications

  • How to train trunk strength using loaded carries, hip‑dominant lifts, and anti‑rotation strategies.

  • How to train stiffness modulation using perturbation drills, medicine ball throws, plyometrics, and reactive tasks.

  • How to integrate breathing and intra‑abdominal pressure into trunk stiffness work.

  • How to develop lumbopelvic control through alignment, sequencing, and single‑leg/rotational tasks.

​

• • Programming & Coaching Insight

  • How to place trunk work within a session depending on the training phase.

  • Why high‑rep “core endurance” work is often misaligned with athletic demands.

  • How to progress exercises based on load, complexity, asymmetry, and velocity.