aerobics,n.pl.(const.assing.orpl.)orig.U.S.|ɛəˈrəʊbɪks|[f.aerobic a.: see -ic 2.](A method of) physical exercise for producing beneficial changes in the respiratory and circulatory systems by activities which require only a modest increase in oxygen intake and so can be maintained.1968K. H. CooperAerobics iii. 40After five hours of that[sc. golf]you've walked well past the point where anaerobics leave off and aerobics begin.1968Chicago Tribune 9 July i. 12/3Under the aerobics program, a person is awarded a number of points according to the amount of exercise he does each week.1972Washington Post 16 Apr. e24/4Aerobics stresses getting the heart, lungs and circulatory system fit.1982Observer 18 July 25/1Aerobics have become the latest fitness craze.1983DailyTel.9 Nov. 19/4If a class is billed as aerobics, your teacher should have a certificate gained in America.1986P. BoothPalm Beach ii. 31The air-waves of the small, stuffy gym reverberated with the insistent drum notes as thirty pairs of track shoes beat out the rhythm of the aerobics routine.