Physical fitness of the top judoists in Japan - Sasa, T.; Shinozuka, T.; Kato, N.; Matsumoto, Y.; Ogawa, S.; Morita, S.; Akutsu, K.; Ikai, M.; Ishiko, T.; Yamakawa, J.; Asami, T.; Tomiki, K.; et al. (Association for the Scientific Studies on Judo, Kodokan, 1961)