I do not have a background in ballet so please bear with me! I just think that mixing up all kinds of exercises keeps it interesting and more importantly, it keeps us motivated. I love barre inspired exercises as it just makes your legs BURN! I hope you feel it too.
Get sweating with these simple cardio and stretch exercises. You will get your cardio training in or you will get nice and warm for some of my other videos. A great warm up will get your heart rate up, improve blood flow which will help the muscles to be more alert and thereby help preventing injury from happening. Make sure to always warm up before heavy sports.