Introducing Instability: The Secret to a Stronger, Safer Core

Build for Health with Srdjan Injac · Nov 27, 2025 · 31m

In this episode of Build for Health, Pete and trainer Srdjan Injac dig into what the “core” really is—and why it’s far more than the six-pack we’ve all been taught to chase. Srdjan breaks down the core as a 360-degree muscular system, not a single muscle group, and explains why abs alone represent only about 20% of what truly keeps us upright, stable, and injury-resistant. From the way sitting at a desk weakens deep stabilizers, to why most back pain comes from core fatigue rather than structural damage, Srdjan reframes core training as the foundation of long-term strength and mobility…