Yar demonstrates Aikido program

A blue exercise mat on the floor

An exercise mat was a floor covering that prevented those engaging in martial arts from becoming injured.

In 2266, USS Enterprise's gymnasium had exercise mats on the floor. (TOS: "Charlie X")

In 2364, an exercise mat was on the floor of USS Enterprise-D's holodeck while the holoprogram Aikido 1 was running. (TNG: "Code of Honor")

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