Knife Thrust Timing

[Glenn E. Meyer]

From my morning news feed on such things:

https://www.sciencedirect.com/scienc...79073822002018

The performance during four stationary knife attacks: implications for tactical training

Citation


Kantor M, Lewinski WJ, Reiner S, Pettitt R. Forensic Sci. Int. 2022; 337: e111371.

Copyright


(Copyright © 2022, Elsevier Publishing)

DOI


10.1016/j.forsciint.2022.111371

PMID


35809543

Abstract


With over 72,000 offenses between 2010 and 2020 in the USA, knives were the third most commonly used weapon in all violent crimes between behind personal weapons and handguns.

PURPOSE: Examine the performance of different stab (Thrust and overhead) and slash (Figure 8 and Reverse) knife motions to determine how long it takes to execute each motion. In addition, examine the variability in executing each motion to inform future self-defense strategies.

METHODS: Twenty subjects (Females, n = 4; Males, n = 16; Height: 179.96 ± 8.66 cm; Weight: 94.99 ± 22.37 kg; Age: 36.95 ± 10.63 years) who were all active-duty law enforcement officers (LEOs) with 13.52 ± 11.23 years of LEO experience were recruited to participate in the study. Each subject completed two trials of the knife motions while wearing wearable motion sensors (ADPM) and recorded with a high-speed camera (GoPro) while using a training knife (Cold Steel).

RESULTS: The time to complete the motions were: Thrust, 0.61 ± 0.15 s; Overhead, 0.68 ± 0.14 s; Figure 8, 1.07 ± 0.21 s; and Reverse, 0.62 ± 0.11 s. The Figure 8 motion was significantly slower than the other three motions: F (3, 57) = 101.19, p < 0.001, ηp2 = 0.84. The reliability analysis reported trivial variability and a high level of agreement: Thrust, ICCα = 0.701, SEM = 0.09 s, CV% = 15.02; Overhead, ICCα = 0.878, SEM = 0.05 s, CV% = 6.93; Figure 8, ICCα = 0.906, SEM = 0.07 s, CV% = 6.25, Reverse, ICCα = 0.420, SEM = 0.10 s, CV% = 17.31.

DISCUSSION: Most LEOs or civilians within striking distance of someone with a knife may not be able to avoid contact from the knife attacks based on the speed knife attacks could occur.

CONCLUSION: The reference data provides pertinent information to update evidence-based training approaches to knife attack preparation and defense.

The whole PDF needs to be purchased.

[DanTheWolfman]

From my morning news feed on such things:

https://www.sciencedirect.com/scienc...79073822002018



The whole PDF needs to be purchased.

Cool data, thanks.

I edited a new 3 min Knife defense highlight vid last night that I will publish soon if interested and have a few instructional type vids already.

[GyroF-16]

“… knives were the third most commonly used weapon in all violent crimes between behind personal weapons and handguns.”

Has me wondering what “personal weapons” are, if they’re not knives or handguns.
Whatever they are, they sure are popular.

[DanTheWolfman]

“… knives were the third most commonly used weapon in all violent crimes between behind personal weapons and handguns.”

Has me wondering what “personal weapons” are, if they’re not knives or handguns.
Whatever they are, they sure are popular.

I believe that is FBI speak for hands/feet kicks punches. apparently they ignore elbows and knees lol . I believe that is it.

[BehindBlueI's]

“… knives were the third most commonly used weapon in all violent crimes between behind personal weapons and handguns.”

Has me wondering what “personal weapons” are, if they’re not knives or handguns.
Whatever they are, they sure are popular.

First off, that's bullshit. Battery is a "violent crime" and the number of simple batteries that occur via "personal weapons" dwarves any other weapon type.

To answer the question, it's using your own body as a weapon. Punching someone, strangling someone, etc. UCR tables usually list it as hands/feet/fist but the handbook/training makes it clear it is any body part. If you headbutt someone to death, it's samey-same stats wise as if you kicked them in the head.


For Murder specifically, it's very heavily skewed toward child victims. Shaken babies, for example. It's exceedingly rare among non-domestic relationship adult murders.

[SouthNarc]

Another OUTSTANDING example of fetishizing TIME.

[awp_101]

the number of simple batteries that occur via "personal weapons" dwarves any other weapon type.

My brain read that as:

the number of simple batteries that occur via "personal weapons", dwarves or any other weapon type

I must need more coffee…