das Aerobic
aerobics
A fitness workout consisting of rhythmic gymnastic exercises done to music, mainly promoting endurance and coordination.
Jeden Dienstag geht sie zum Aerobic ins Fitnessstudio.
Every Tuesday she goes to aerobics at the gym.

aerobics
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aerobics
A fitness workout consisting of rhythmic gymnastic exercises done to music, mainly promoting endurance and coordination.
Jeden Dienstag geht sie zum Aerobic ins Fitnessstudio.
Every Tuesday she goes to aerobics at the gym.

'Aerobic' (aerobics) is a word from English. Like many sports and activity terms from English, it has the neuter article 'das' in German.
Das Aerobic, das in diesem Studio angeboten wird, ist sehr intensiv.
The aerobics offered at this studio is very intense.
To express that you practice this sport, you use the verb 'machen' (to do): 'Aerobic machen' (to do aerobics). When you go to a class, people often say 'zum Aerobic gehen' (to go to aerobics).
Wir gehen zweimal pro Woche zusammen zum Aerobic.
We go to aerobics together twice a week.
'Aerobic' (aerobics) often serves as the base word for more specific types of training. Well-known examples are 'Step-Aerobic' (step aerobics) or 'Wasser-Aerobic' (water aerobics).
Im Sommer ist Wasser-Aerobic im Freibad besonders beliebt.
In summer, water aerobics at the outdoor pool is especially popular.
gymnastics / exercises
'Gymnastik' and 'Aerobic' both belong to the area of fitness and movement. 'Gymnastik' is the more general term for exercises that strengthen, stretch, or make the body more flexible. 'Aerobic' is a specific type of fitness workout: you move rhythmically to music, usually in a class, and especially train endurance and coordination. The words can be confusing because aerobics can consist of gymnastic exercises. When music and rhythmic movements are important, 'Aerobic' fits. For general body exercises, 'Gymnastik' fits.

Beim Aerobic bewegen wir uns schnell zur Musik.
In aerobics, we move quickly to music.
Im Büro machen wir morgen kurze Gymnastik gegen Rückenschmerzen.
At the office tomorrow, we will do short exercises for back pain.