海量图书期刊资源，随时随地畅享阅读乐趣
Which element of physical activity is more important for determining bone growth in Japanese children and adolescents: the degree of impact, the period, the frequency, or the daily duration of physical activity?Junko Tamaki; Yukihiro Ikeda; Akemi Morita; Yuho Sato; Hiroshi Naka; Masayuki Iki · 2008