The foam cube in the gym is called a yoga brick. It is specially used in yoga class as an auxiliary exercise, and the effect is very good. Yoga brick is an auxiliary tool for beginners and practitioners with poor flexibility, which helps to adjust posture and help the body achieve some movements. Yoga bricks can help us support different parts of the body, and avoid the tension of other parts of the body caused by poor softness or insufficient muscle strength for beginners (if there is no yoga brick, a thicker book can be used instead). When doing some basic yoga moves, such as forehand, you can use bricks to transition when your hands can't touch the ground. When making a half-moon shape, when the balance is not stable enough, bricks can be used for transition.