a) proper alignments:
| 2) | depth - arm extended forward and slight bend in elbow (not hyper-extended) |
| 3) | width - in-line with body |
| A) | rotated to be vertical (thumb downward) |
| B) | knuckles pointed directly to the side |
| 2) | wrist kept straight (not bent up / down and / or side-to-side) |
| 3) | elbow almost in-line with fist (horizontally) (slightly anchored) |
| 5) | upper body / hips - Neutral Bow rotation |
| 6) | legs / feet - Neutral Bow rotation |
| iii) | Point of Contact - back of first two knuckles of fist |
b) proper formation - weapon (hand):
| i) | fingers - standard fist (tightly bent and kept together to form Compact Unit) |
| 1) | wrapped under bent fingers (Compact Unit) |
| 2) | do not allow to separate from contact with fingers |
c) execution:
| i) | Method of Execution - Round-housing |
| ii) | execute directly to target (prevent cocking) |
| 1) | improper speeds / methods: |
| A) | executed too slow (transforms into push with fist) |
| B) | executed too tense (unable to achieve proper 'snap' of strike) (strike looks 'pushed' out) |
| C) | strike not tensed at Point of Contact (improper timing / never tensed) |
| 2) | improper alignments / angles: |
| I) | over bent (full reach of strike not achieved) |
| II) | too-extended (elbow hyper-extended) |
Form Specific
a) Common execution errors:
| i) | not executed to proper depth |
| 1) | executed to almost parallel in front of body |
| 2) | executed almost like straight, inverted, vertical punch |
Comments
a) Common execution errors:
| i) | executed with shrugged shoulders |
Example of a proper inverted vertical back-knuckle strike (left)
Example of proper inverted, vertical, back-knuckle formation
Examples of improper Inverted Vertical Back-knuckle
wrist bent to side, wrist bent forward,
strike under rotated, strike over rotated
Examples of improper inverted, vertical, Back-knuckle strike execution
improper height - high / low, shrugged shoulders,
elbow over extended / over bent, leaning