energetic physical exercises, often performed with a group of people to music, that make the heart, lungs, and muscles stronger and increase the amount of oxygen in the blood

She does aerobics. 她做有氧健身操。

I go to aerobics (= to a class where we are taught such exercises) once a week. 我每周去一次有氧健身操训练班。

an aerobics instructor/teacher 有氧健身操教练／教师