I was also introduced to "Jacky Aerobics" by a friend. At that time, I did exercise for about an hour with a healthy heart, and I felt very comfortable both physically and mentally. After that, I practiced for three hours every day. After four days, my body began to improve, so I completely believed in "Jacky calisthenics", arranged my time and concentrated on it. Until March 24th, 2006, my back pain, stomach trouble and scapulohumeral periarthritis all disappeared.