Department of Physical Therapy Faculty of Human Science Hokkaido Bunkyo University Hokkaido Japan;
Department of Physical Therapy Ibaraki Prefectural University of Health Sciences Ibaraki Japan;
Department of Physical Therapy Okinawa College of Rehabilitation and Welfare Okinawa Japan;
Department of Physical Therapy Ibaraki Prefectural University of Health Sciences Ibaraki Japan;
Medial Collateral Ligament; Valgus Stress Test; Extension Rate;