| a) | proper alignments: |
| i) | dimensions: |
| 1) | height - groin level |
| 2) | depth - striking arm extended to depth of Invisible Box |
| 3) | width - center of body |
| ii) | body alignments: |
| 1) | hand: |
| A) | rotated to be vertical |
| B) | knuckles pointed directly downward |
| 2) | wrist bent front / backward to point knuckles downward (not bent side-to-side) |
| 3) | shoulders - relaxed |
| 4) | upper body / hips - Forward Bow rotation |
| 5) | legs / feet - Forward Bow rotation |
| iii) | Point of Contact - side of hand |
| iv) | stance - Forward Bow |
| b) | proper formation - weapon (hand): |
| i) | fingers - standard fist (tightly bent and kept together to form Compact Unit) |
| ii) | thumb: |
| 1) | wrapped under bent fingers (Compact Unit) |
| 2) | do not allow to separate from contact with fingers |
| c) | execution: |
| i) | Method of Execution - Hammering |
| ii) | execute directly to target (prevent cocking) |
| iii) | improper execution: |
| 1) | improper speeds / methods: |
| A) | executed too slow (transforms into push with fist) |
| B) | executed too fast (stance rotation unable to keep up with strike) |
| C) | executed too tense (unable to achieve proper 'snap' of strike) (strike looks 'pushed' out) |
| D) | strike not tensed at Point of Contact (improper timing / never tensed) |
| 2) | improper alignments / angles: |
| A) | elbow over bent or hyper-extended |
Form Specific
| a) | Common execution errors: |
| i) | wrist not bent properly to strike with side of hand |
Comments
| a) | Common execution errors: |
| i) | over rotate beyond a Forward Bow |
Example of a proper forward, underhand, reverse hammer-fist (right)
(with block - from forward bow)
Example of proper forward, underhand, reverse, hammer-fist formation
Example of improper hammer-fist
formation / alignment
thumb tucked, pinky out,
wrist bent to side, wrist no bent propery
Examples of improper forward hammer-fist execution
improper depth - close / far width - narrow / wide,
over rotation, foot not flat