Investigation 1
We define general sports books as books whose titles or subtitles include terms like “exercise physiology”,
“biomechanics” or “sport training”. We leave the books of other titles for future research. We chose books
published from 1945 to March 2008. The reasons we did not use books published before 1945 are: (1) Users do
not read old books; (2) Old information will not be effective in improving competitive sports abilities; and (3)
The National Diet Library in Japan, which we will mention later was established after WWII, and the books
related to the period before 1945 would be missing.
We submitted the previously-mentioned three titles to each university library OPAC and counted the
number of holdings