A universal booster, you can exercise the upper, lower and oblique abdominal muscles comprehensively and evenly. The advantage of the booster is also a wide range of exercises with your own weight, with which you can effectively exercise your chest, lower limbs or arms. You can do push-ups, biceps and triceps lifts, or involve your calves or thighs in the exercise.The resistance of the booster, which you have to overcome, is created by a pair of springs on the sides of the device. The stiffness of the springs can be adjusted thanks to a pair of wheels on both sides of the booster. In this way, you can achieve the ideal setting of the booster, thereby increasing the effectiveness of the exercise. After completing the exercises, the booster can be easily folded down to a size that does not take up much space and can be easily stored away.The construction of this exercise aid consists of a solid metal frame, which ensures high load-bearing capacity and stability. The comfortable support surface of the rollers is made of non-slip and pleasant to the touch foam material.personal collection