Apart from the fact that mungbeans are wonderful to detoxify your intestines, you can also train with them. Yes you can! They can be used for many things.
Working with a beanbag, or a beansock, comes from the Healing Tao of Matak Chia. Healing Tao is rooted in Traditional Chinese Medicine. (TCM).
The technique of massaging or rather hitting with the beansock, has a very deep cleansing effect. It detoxifies the skin and the joints, the connective tissue and the tendons and it opens the energy in the meridians. The meridians are the highway of energy in your body so to speak.
You can use this hitting technique with f.ex. constipation, headaches. You can use the mungbeans for sprains and a faster recovery from fractures. Using your mungbeansack or –sock is very refreshing and revitalising. You can hit in the morning or as a break from sedentary work. Any time you feel like it.
In the past, I have followed Healing Tao lessons in combination with shamanic techniques. In Shamanism, the bones (and bone-marrow) stand for ancestral energy. From the shamanic point of view, this/your generation, stands on the shoulders of the previous one. So, when you use your beansack or –sock, you are cleansing ancestral energy as well.