Isolations are basically isolating single body parts - the hands, one leg, even one knee - to perform a dance move focused on that one body part. This means you can perform an isolation by popping your knee or gliding your arm up and down, for example.
As a result, there are many different forms of isolations you can do, some intricate and some big. Check out this video for a guide to isolations and how to maintain your posture.
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