Squeezing stool with the inner thigh can activate leg muscles (especially adductor, hamstring and gluteal muscles) more strongly. The harder the leg muscles contract, the greater the power to drive the leg when bench pressing. Help users improve stability, because your thighs basically fix the user's body on the bench.
It is important to keep the scapula stable. In the initial position, the center of the barbell falls right on the shoulder blade. In this process, you must feel the user's upper back pressing on the stool.