Sigung Richard Clear is a 3rd generation lineage holder in Tai Chi from Lee Ying Arng, the author of the original book Iron Palm in 100 Days and numerous other works on Tai Chi and Internal Arts. Do Not confuse this with other more common Iron Palm methods. Internal Iron Palm is healthy for you and adds power, vitality and ability to you as you train it. You will see benefits from this method very rapidly and will have a brick breaking level of skill if you practice consistently every day for 100 days. Of course you will see more benefits if you practice for many more days than that. 3 years of consistent everyday practice will produce extraordinary results of a very high level. Once you have the Internal Iron Palm as long as your body and mind are still active and healthy you will never lose the ability. One of the most noticeable and nice benefits of internal iron palm is that to train it does not require you to hit or use materials other than yourself. The demonstrations show students breaking different types of boards. These breaks are fairly easy to achieve with this training, but breaking materials is only used to test Iron Palm, not to train it. Your own body, your own movement, your own mind and spirit. Those are the tools. Secrets of Tai Chi Iron Palm: http://www.clearstaichi.com/iron-palm