Minor Axes
Note: This document requires review. Content may be incomplete or subject to change.
| Aspect | Description |
|---|---|
| Category | Physics / Rotation |
| Priority | Intermediate |
| Applies To | Joint manipulation, limb movement, technique refinement |
Summary
While the primary Axis runs vertically through the body's center, Minor Axes exist at every joint - shoulder, elbow, wrist, hip, knee, ankle. Each joint rotates around its own axis, and the quality of technique depends on how well these minor axes align with and support the primary axis. Understanding Minor Axes explains why joint position matters and how small adjustments create large effects.
The Principle
Core Concept: Every joint has its own axis of rotation. Technique quality depends on how these minor axes coordinate with the primary axis and with each other.
Joint as Axis:
- Each joint in the body can be viewed as a pivot point
- The limb segments rotate around these pivot points
- When minor axes align properly, power transfers efficiently
- When misaligned, power leaks at each joint
Relationship to Primary Axis:
- The primary Axis (vertical, through center) governs whole-body rotation
- Minor axes should support, not fight, the primary axis
- Misaligned minor axes create wobble in the primary axis
- Coordinated minor axes create clean, powerful movement
Minor Axes in the Arm
Shoulder Axis:
- The shoulder allows rotation in multiple planes
- Proper shoulder position keeps arm connected to torso power
- Raised or forward shoulders create disconnection
- The shoulder axis should align with spinal rotation
Elbow Axis:
- The elbow primarily hinges in one plane
- Elbow position determines how force travels through arm
- Locked elbow transmits force rigidly
- Bent elbow can absorb or redirect force
Wrist Axis:
- The wrist allows rotation and flexion
- Wrist alignment determines strike surface contact
- Misaligned wrist absorbs impact meant for target
- Proper wrist alignment transmits full force
Minor Axes in the Leg
Hip Axis:
- The hip allows rotation in multiple planes
- Hip position determines kick power and stability
- Hip rotation drives whole-body movement
- Disconnected hip = disconnected technique
Knee Axis:
- The knee primarily hinges
- Knee alignment affects stability and power transmission
- Knee should track over foot
- Twisted knee creates weakness and injury risk
Ankle Axis:
- The ankle allows rotation and flexion
- Ankle position affects rooting and balance
- Proper ankle alignment grounds the structure
- Collapsed ankle breaks the power chain
Coordination of Minor Axes
Sequential Activation:
- Power moves through minor axes in sequence
- Ground â ankle â knee â hip â spine â shoulder â elbow â wrist â hand
- Each axis accelerates the next (Wave Energy)
- Proper timing maximizes power transfer
Common Misalignments:
- Shoulder leading before hip (arm-only striking)
- Elbow flaring out (breaks structure)
- Wrist collapsing on impact (absorbs own force)
- Knee caving in (structural weakness)
Minor Axes in Joint Locks
Exploiting Opponent's Axes:
- Joint locks work by rotating a minor axis past its range
- Understanding axis location reveals lock application angle
- Pressure perpendicular to axis rotation causes pain
- Pressure along axis rotation allows escape
Protecting Your Own Axes:
- Keep minor axes aligned to resist manipulation
- Misaligned joint is vulnerable joint
- Maintain structure through all minor axes
- Awareness of axis position prevents locks
Connection to Other Principles
- Axis (axis-rotation): Primary axis that minor axes support
- Spinal Alignment (spinal-alignment): Spine connects minor axes
- Wave Energy (wave-energy): Power flows through aligned axes
- Sequential Locking (sequential-locking): Locks exploit minor axes
- Structural Alignment (structural-alignment): Overall alignment includes all axes
- Kinetic Chain: Minor axes are links in the chain
Common Errors
- Isolated joint movement - Moving one axis without coordinating others
- Locked joints - Rigid minor axes block power flow
- Collapsed joints - Weak minor axes absorb intended force
- Misaligned rotation - Axes rotating against each other
- Ignoring distal axes - Focusing on hip while wrist collapses
- Fighting own structure - Minor axes working against primary axis
Training Applications
Joint Isolation:
- Practice rotating each joint independently
- Feel where each axis is located
- Notice range of motion at each axis
Chain Coordination:
- Practice moving power through connected axes
- Start slow: ankle-knee-hip sequence
- Add upper body: hip-spine-shoulder-elbow-wrist
- Feel the acceleration through the chain
Partner Axis Work:
- Partner identifies when your axes misalign
- Practice maintaining alignment under pressure
- Notice which axes tend to collapse first
| Aspect | Description |
|---|---|
| Document Status | Complete |
| Reference | The Book of Martial Power by Steven Pearlman |
About This Document
| Metadata | Value |
|---|---|
| Author | Thomas Mangin |
| Created | 2025-12-26 |
| Last Updated | 2025-12-26 |
Research, drafting, and revision conducted in collaboration with Claude AI (Anthropic). All technical content reflects the author's knowledge and understanding developed through training and practice.