The Elastic Fitness Stick is made of glass fiber, and the weights at both ends are made of rubber. It can produce 5 Hz of vibration. This Exercise Bar is based on the principle of resonance, it can efficiently train deep muscles, all the abdominal muscles and all the shoulder muscles, until the deepest layer of the muscles will be strengthened at the same time, the body metabolism will increase. You can take the Elastic Fitness Stick anywhere you travel, he can split into two parts to save you space, weighs only 1.41 lb, and it has a patterned plastic handle with a unique shape that fits better in the palm of your hand to prevent it from slipping off when you sweat. The Fitness Stick can be used sitting, standing, moving or balanced, making it suitable for all ages and fitness levels. It helps to strengthen the body, increase balance with flexibility and burn calories. It provides additional resistance for power training.