About the Authors

Satoshi Yamaguchi

y-satoshi@mvb.biglobe.ne.jp

Affiliation Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan

Masako Kitamura

Affiliation Division of Rehabilitation Medicine, Chiba University Hospital, Chuo-ku, Chiba, Japan

Tomohiro Ushikubo

Affiliation Division of System Development, Anima Corp, Chofu, Tokyo, Japan

Atsushi Murata

Affiliation Division of Rehabilitation Medicine, Chiba University Hospital, Chuo-ku, Chiba, Japan

Ryuichiro Akagi

Affiliation Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan

Takahisa Sasho

Affiliation Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan

Competing Interests

One of the authors was employed by a manufacturer of the three-dimensional motion analysis system and force plate used in this study. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: SY MK TU AM RA TS. Performed the experiments: SY MK TU AM. Analyzed the data: SY MK TU RA. Contributed reagents/materials/analysis tools: SY TU AM TS. Wrote the paper: SY AM RA TS.