Physical workers should also use the brain frequently so as to achieve the balance between physical and mental activities. Develop their interest in study, and take some courses selectively according to the features of their occupation like gardening, cooking, sewing and painting. Also, train memory consciously. Read more books and newspapers when going off work. They may participate in some head-using games like playing chess and guessing riddles. More information, please continue to read Herba Dendrobii (Shihu)