Can martial arts training be considered a weapon in a court of law?

Answer 1

No, martial arts training is not a weapon.

However, many jurisdictions in the US do consider the use of hands and feet as enough to increase the charge from assault (aka, simple assault) to aggravated assault. This means the use of hands and feet during an assault (whether they are those of a professional or trained martial artist or a normal person) can be charged as a felony. Courts have been reluctant to rule that footwear is a dangerous weapon, though a pair of shoes certainly can increase the damage done by a kick.

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Answer 2

In some cases, Martial Arts training may be considered a factor in determining the level of threat someone poses, but it is not typically considered a weapon in itself in a court of law. The use of martial arts techniques in a situation could be seen as a demonstration of ability to harm someone. Ultimately, the context and intent of the person using the martial arts training would be more important in legal proceedings.