Scientists are now able to measure the physiological effects of emotional states. Your body actually becomes weaker or stronger depending on your mental state.
Your left side is receptive, or yin. It responds to stimuli from your environment. It holds your experiences (past), your emotional self, your memories, and emotional joy or pain.
Your right side organizes and moves you forward into the future. It governs how you interact with the world. That is a yang energy. When you are experiencing problems on your right side, you may feel stuck or hampered in moving forward. Or you may be experiencing unwanted change that is causing fear, reluctance, or trepidation.
Your front side reveals your social or public self, the part of you that the world sees. It reflects those aspects of yourself that are active ingredients in your day-to-day living. This includes communication, desire, caring, loving, happiness, sadness. These show in your face, posture and body language.
Your back side reflects private and unconscious elements of your life. This side becomes the storehouse for everything you don't want to deal with or don't want other people to see. Hidden or unexpressed feelings become frozen into the structure of your body. That means a lot of negative emotions become stored along your spine and in the backs of your legs. Most of your powerful emotions such as anger and fear are stored in your back.