Welcome to day 11 of the 12 Days of Fitness! We hope you’re feeling great and ready to take on the final two days of the challenge — just in time for the holidays! Today, celebrity trainer Ramona Braganza is talking about how to get strong abs. For her, it’s all about the classic plank — a move that her celeb clients, like Halle Berry and Kate Beckinsale, do regularly, but especially when leading up to a role or red-carpet event. Ramona has a simple adjustment for amping up the power of the plank in the video above. Try it out when you’re in plank during today’s 10-minute workout, in the chart below.