🦶 Zone 1,3 – Heel Outer (Lateral Calcaneus)

This zone sits on the outer posterior edge of the heel bone, the lateral calcaneus, and is the most common contact point during untrained heel strikes and pronated standing.


🔬 Anatomical Role

  • Initial contact point for many walking patterns

  • Primary location for heel wear on shoes

  • Underlies the calcaneal tuberosity (lateral portion)

  • Receives no direct muscular control


🔬 Structural Support

| Structure | Type | Action | Relevance |

|-----------|------|--------|-----------|

| Peroneus longus tendon (nearby) | Tendon | Everts foot | Adjacent, not direct |

| Lateral calcaneal ligaments | Ligament | Stabilizes ankle | Passive protection only |

| Fat pad (lateral portion) | Tissue | Shock absorption | Primary defense |


⚙️ Biomechanical Function

  • Very stable for lateral load-bearing

  • Prone to collapse under medial torque

  • Poor feedback and proprioception

  • Tendency to cause ankle eversion under stress


🧠 Verdict

  • Torque Handling: ⚠️ Limited (resists lateral, not medial)

  • Muscle Support: ❌ None

  • Feedback Quality: ❌ Poor

  • Stability: 🟡 Moderate (good for stillness, not for agility)


🩰 Use in Dance

  • Rarely used intentionally in poise

  • Seen during errors or unstable heel landings

  • Contributes to ankle rollouts and loss of verticality

“1,3 is where you land when things went a bit sideways.”


✅ Summary

Zone 1,3 is the fallback zone — present in everyday walking, but rarely used in poised, elevated dance. Strong enough for stillness, but not built for finesse.