Just like any dance class, it is important to warm up effectively before starting a floor barre. Make sure your warmup includes spinal mobilisers, hip mobilisers and a foot warmup. it is also important to include some activation exercises for core, turnout, deep inner thighs and intrinsic foot muscles.
Some mobility exercises you may want to include in your warm up are cat stretch, thread the needle, QL stretch, hip flexor mobilisers in sitting and pretzel stretch.
Important activation exercises include knee folds, leg circles, QF in side lying, cushion squeezes, doming and toe swapping.