Multifunction Fitness 6 in 1 AB Wheel Roller Kit Plank Abdominal Roller Wheel for Core Training

Abdominal muscle wheels can strengthen eccentric contractions. Eccentric contraction mainly means that under the action of external forces, the muscle fibers are controlled by external forces and are elongated. This is the most effective form of contraction for muscle shape and strength training. Simply put, it's like when you go to the supermarket and buy a basket of eggs and come home, you don't throw the basket directly on the table as soon as you enter the door, but you have to slowly and forcefully place the basket on the table. The process is an eccentric contraction, rather than a concentric compression, as you slowly lift the basket up.