It depends on what exercise you do. When making a mask, it is suitable for lying on your back on the bed and doing some leg exercises, such as stretching your legs and standing 90 degrees against the wall. Standing on the mask itself is not appropriate. The weight of the mask will stretch your skin, which is not easy to absorb, but makes your skin sag easily. If you exercise again, you can imagine the damage. Therefore, you can't do standing exercise when making a mask.