In a normal jazz class dancer normally do an exercise called develope, it is where you slowly bring your leg up and “develope” it into a strong and straight leg, this is just the gist of it. Next, is in depth the perfect develope. First, they lift their leg at a 45˚, have your leg straight, foot pointed, your leg not hyperextended, but turned out. Oh by the way that was just for legs, next is the arms, then the rest of your body like your core, and head. Stick out your arms one on each side and round them like you’re hugging a giant tree, tuck your thumbs so people in front of you can’t see it, slightly curve all your fingers, slightly straighten your pointer finger, stand up straight, slightly lift your head, engage your core, support your arms with your back, drop your shoulders and put your nicest smile on your face, hold this for a minute and then slowly let down your leg so it doesn’t make a sound. This is what dancers do on a day to day basis, not just in a performance but in class and rehearsal.
I hope that you now know why dance should be a sport. Dance should be is a sport because it pushes you to your limits, it follows the definition of a sport and is very much like any other