Acknowledgment to reviewers The Japanese Society of Physical Fitness and Sports Medicine 2013 We gratefully acknowledge the contributions of (November 1, 2012 - October 31, 2013): Acknowledgment Kentaro CHINO Satoshi FUJITA Kozo FUNASE Genki FUTATSUBASHI Kazushige GOTO Kazuhiro HARADA Naoyuki HAYASHI Mitsuru HIGUCHI Nobuyoshi HIROTSU Hiroaki HOBARA Yoshihiro HOSHIKAWA Masashi ICHINOSE Kuniyasu IMANAKA Akiko IMURA Masaki ISHIKAWA Tetsuya IZAWA Kiyotaka KAMIBAYASHI Mifuyu KAMO Ryoji KASANAMI Emika KATO Yasuo KAWAKAMI Ryuji KAWAMOTO Kentaro KAWANAKA Tadashi KIMURA Takako KIZAKI Shohei KOKUDO Seiji MAEDA Shigeru MAKITA Taishi MIDORIKAWA Kazuhiro MINAMI Shinji MIURA Hiromi MIYAZAKI Teruo MIYAZAKI Keiko MORIMOTO Noriteru MORITA Taro MURAKAMI Haruki MUSHA Yasuharu NAGANO Ryoichi NAGATOMI Naoya NAKAI Takeshi NISHIJIMA Toshiaki ODA Jun-etsu OGASAWARA Hideki OHNO Susumu S. SAWADA Kazuhiko SEKI Ryosuke SHIGEMATSU Yohei SHIMOKOCHI Ken SHIRATO Akitoshi SOGABE Hirohito SONE Koya SUZUKI Youhei TAKAI Shigeho TANAKA Toshiki TAZOE Hirotsugu TSUCHIMOCHI Yuji UCHIO Jun UDAKA Yukio URABE Hidefumi WAKI Taichi YAMAGUCHI J Phys Fitness Sports Med, 2(4): 524 (2013)