Hyperactivity is defined as:

Hyperactivity is characterized by increased or excessive muscular activity, which manifests as higher than typical levels of movement and energy. This can include fidgeting, restlessness, and difficulty remaining still or quiet. The description of hyperactivity aligns with behavioral observations seen in various contexts, such as in children with attention-deficit/hyperactivity disorder (ADHD), where there is often an inability to regulate motor activity consistently.

In contrast, extremely low physical activity corresponds to inactivity rather than hyperactivity. Normal levels of muscle activity would not indicate any hyperactive behavior, as it reflects typical, expected movement. A deliberate act of distraction suggests intentional behavior designed to divert attention, which differs fundamentally from the involuntary nature of hyperactivity often observed in individuals who experience it. Thus, the definition of hyperactivity focuses specifically on the heightened levels of muscular engagement.