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A spine crank (the term spine lock is also often used to refer exclusively to this type) is a spinal lock that affects the thoracic and/or lumbar regions of the spinal column. A spine crank is applied by twisting or bending the upper body beyond its normal ranges of motion, causing hyperextension, hyperflexion, or hyperrotation of the spine.
An underhook is a clinch hold that is used in grappling to control the opponent. [1] It is performed from any direction by putting an arm under the opponent's arm, and holding the opponent's midsection or upper body. [2] Having an underhook with one arm is called a single underhook, while having underhooks with both arms is known as double ...
A quick-return mechanism is a subclass of a slider-crank linkage, with an offset crank. Quick return is a common feature of tools in which the action is performed in only one direction of the stroke, such as shapers and powered saws , because it allows less time to be spent on returning the tool to its initial position.
Two soldiers in a "crude north–south position". A pinning hold (also known as a hold down and in Japanese as osaekomi-waza, 抑え込み技, "pinning technique") is a general grappling hold used in ground fighting that is aimed to subdue by exerting superior control over an opponent and pinning the opponent to the ground.
A crank is an arm attached at a right angle to a rotating shaft by which circular motion is imparted to or received from the shaft. When combined with a connecting rod, it can be used to convert circular motion into reciprocating motion, or vice versa. The arm may be a bent portion of the shaft, or a separate arm or disk attached to it.
Armbar counter on the ground normally is a body roll towards the opponent in order to prevent overextension of the captured elbow bend. The jūji-gatame (十字固め, rendered as "Ude-Hishigi-Juji-Gatame"), which translates to "cross pin" or "cross hold down" also sometimes used interchangeably with the terms armbar, cross armbar or straight armbar, is a Jujutsu, and thus a Judo, technique ...
A grapple is a hook or claw used to catch or hold something. A ship's anchor is a type of grapple, especially the "grapnel" anchor.. A soldier loading a hook. A throwing grapple, kaginawa (or "grappling hook" ) is a multi-pronged hook that is tied to a rope and thrown/launched to catch a grip, as on a parapet or branch of a tree. [1]
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