Should the science of the Achilles subtendons actually change how you rehab tendinopathy? In Part III, Stephanie Cone walks through what we know about subtendon architecture in healthy and pathological tendons—then we lay out the case for and against targeting these units independently in practice. The honest answer sits in the space between plausibility and proof. Part III of The Debrief, revisiting each presentation from our 2026 Summit. Read this edition with full references at traversecitytendonsummit.com.

The Debrief revisits each presentation from our 2026 Summit, one speaker at a time. In Part II, Falk Mersmann examines how the muscle-tendon unit actually behaves—not as a simple spring, but as a system that reorganizes itself to meet the task at hand, whether the goal is conserving energy, producing work, or generating maximum power. Read this edition with full references at traversecitytendonsummit.com.

The Debrief revisits each presentation from our 2026 Summit, one speaker at a time. In Part I, Neal Millar makes the case that the field has underperformed on tendinopathy because it has paid too little attention to the biology—and lays out the inflammatory pathways, and emerging therapies, that point to where treatment is headed. Read this edition with full references at traversecitytendonsummit.com.

KEY TAKEAWAYS

• Tendons function as multiscale load‑bearing tissues that support energy storage and release, power amplification, and force attenuation during movement.

• These capabilities emerge from interactions across hierarchical levels. No single level of structure can explain tendon behavior on its own.

• Several structural features shape tendon mechanics, including limited fascicle load sharing, long continuous fibrils with branching and weaving patterns, hydration‑dependent fibril behavior, and non‑collagenous matrix proteins that influence organization and viscoelasticity.

• Advances in imaging and mechanical testing continue to reveal new layers of complexity and often raise as many questions as they answer.

• This multiscale complexity forms the foundation for understanding how tendons adapt, fail, and respond to training or rehabilitation.