I think your coach asked you to practice this method for a bodybuilder. The kind with muscles, if that's what you want, then you can continue to practice, because only bigger fat blocks can exercise bigger muscle blocks. If you want to add flexibility to your muscles, you don't have to skim them.
But if you don't want that at all, you just want a figure, a slim devil figure, I think you are fooled by the coach. I don't want to earn your money by eating protein powder. You don't need to eat protein powder if you don't want to practice muscle mass.
If the devil is in shape, he doesn't need muscle latitude. Aerobic exercise is the key to reduce sebum. In addition, it is good to practice your chest, two heads and three heads, abdominal muscles and buttocks properly. The practice method is to be light in weight and few in groups, so that the muscles will not be too star-shaped, the clothes will look good, and the places that should be good can also be good.