Final answer:
Step aerobics is characterized by the use of a 'step' to conduct various cardiovascular exercises aimed at improving fitness and lower body strength.
Step-by-step explanation:
Step aerobics is distinguished from other forms of aerobic exercise by its use of steps. Unlike other aerobic exercises that might incorporate music, weights, and jumping, step aerobics specifically involves a platform ('step') that participants step on and off of, typically to the rhythm of music.
This form of exercise focuses on improving cardiovascular fitness and lower body strength. Aerobic exercise, which includes activities like cycling, walking, and swimming, is designed to increase cardiovascular endurance and can also offer benefits like muscular endurance and overall cardiovascular health.