This document discusses aerobics, including its definition, benefits, history, types, and rules for sport aerobics. It defines aerobics as physical activity performed in the presence of oxygen to strengthen the cardiovascular system. The history outlines how Dr. Kenneth Cooper developed the term and exercises in 1968, and how aerobic dance routines were later created. Types of aerobics covered are freestyle, step, water, kickboxing, and dance aerobics. Rules for sport aerobics competitions are also summarized.