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Fleishman’s taxonomy separates abilities into physical proficiency abilities, which describe raw capacity to perform physical tasks (like how much force you can produce, how long you can sustain effort, or how well you maintain body control), from perceptual-motor or psychomotor abilities that deal with processing and responding to information. Strength, endurance, and balance are classic physical proficiency abilities because they reflect the body’s fundamental capabilities to generate force, sustain activity, and control posture. Reaction time, on the other hand, measures how quickly a person detects a stimulus and initiates a response, which hinges on processing speed and motor initiation rather than a basic physical capacity. It’s categorized with perceptual-motor abilities, not physical proficiency. Therefore, reaction time is not a Physical Proficiency ability in Fleishman’s taxonomy.