Kaley Cuoco undergoes some incredibly gruelling workouts to keep her physique, and in a new clip she has shown off some seriously impressive balancing skills.MORE: Golden Globes 2021: The very best momentsIn a series of videos on her Instagram Stories, the Big Bang Theory star balanced on a blue exercise ball, helped by some mobility sticks.The star kept it casual with her workout gear, opting to go with some black sweatpants and a yellow T-Shirt with some hearts on it that read: "Whatever, I'll