2. Bend your elbows, clench your fists with both hands, and clamp inward hard to prevent books or magazines from slipping. How to be effective? It is when your arm feels tired that the effect will slowly come out.

Ps: Don't choose books and magazines that are too thick and too big to do this group of breast enhancement exercises. Bian Xiao suggested using two ordinary notebooks, but they must not be too thin, or you will feel tired before you start.