Kai-Nan An received his BS degree from the National Cheng Kung University, Taiwan, and his MS and PhD(1975) in mechanical engineering and applied mechanics in 1975 from Lehigh University in Bethlehem, PA. In 1993 he was appointed Director of the Orthopedic Biomechanics Laboratory at the Mayo Clinic in Rochester, MN, and Professor of Bioengineering, Mayo Medical School. He was named the John and Posy Krehbiel Professor of Orthopedics, Mayo Medical School, in 1993. Dr. An has received several awards from various societies, including the You-Li Chou Medal from the Taiwanese Society of Biomechanics, the Borelli Award from the ASB, the Distinguished Alumnus Award from National Cheng-Kung University, the Neer Award from ASES, the Kappa Delta Award from AAOS, and was named as a Fellow of the ASME in 2007. Dr. An’s research interests include biomechanics, biomaterials, imaging, wheelchair propulsion, orthopedics, and rehabilitation.