@article{oai:kanazawa-u.repo.nii.ac.jp:00058611, author = {近藤, 仁 and 染矢, 富士子 and Kondo, Hitoshi and Someya, Fujiko}, issue = {2}, journal = {Journal of Physical Therapy Science}, month = {}, note = {[Purpose] Lateral ankle sprains are common injuries suffered while playing sports, and abnormal forward- and inward-directed ground reaction force occurs during a jumping task. However, the influence of hip muscle strength training on jumping performance after ankle injuries has not been fully examined. This study thus examined changes in ground reaction force during a rebound-jump task after training to strengthen hip muscles. [Subjects and Methods] Ten of 30 female high school basketball players were assigned as subjects who showed a difference of 7 or more degrees in dorsiflexion ranges between the bilateral ankles. The subjects underwent 12 weeks of training to strengthen hip abductors and external rotators. Comparisons between before and after training were made regarding ground reaction force components, hip and knee joint angles, percentage of maximum voluntary contraction in leg muscles, and muscle strength of hip muscles during the rebound-jump task. [Results] After training, the subjects showed increased strength of external rotator muscles, increased percentage of maximum voluntary contraction in the gluteus medius muscle, decreased inward ground reaction force, and increased flexion angles of the hip and knee joints. [Conclusion] This study suggests that training to strengthen hip muscles may ameliorate the inward ground reaction force in athletes with ankle dorsiflexion restriction. © 2016 The Society of Physical Therapy Science. Published by IPEC Inc., 金沢大学医薬保健研究域保健学系}, pages = {319--325}, title = {Changes in ground reaction force during a rebound-jump task after hip strength training for single-sided ankle dorsiflexion restriction}, volume = {28}, year = {2016} }