Effects of Daily Walking Steps on Bone Mineral Density at Femoral Neck and Lumber Spine in Postmenopausal Japanese Women

• Project/Area Number: 23500852
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied health science
• Research Institution: Kitasato University
• Principal Investigator: KITAGAWA Jun 北里大学, 一般教育部, 准教授 (80260529)
• Co-Investigator(Kenkyū-buntansha): IKI Masayuki 近畿大学, 医学部, 教授 (50184388)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2011: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
• Keywords: 閉経後女性 / 大腿骨頸部骨密度 / 腰椎骨密度 / 歩数 / 身体活動量 / Ex / 歩行数 / 加速度 / 女性高齢者 / 骨密度 / 骨粗鬆症予防

Research Abstract

This study investigated the effects of daily walking steps on bone mineral density (BMD) at femoral neck (FN) and lumber spine (LS) in postmenopausal Japanese women. The subjects were 340 women with 10 years since menopause or more. BMD was measured by dual X-ray absorptiometry. A triaxial ac-celerometer measured walking steps and converted acceleration into metabolic equivalents (METs). PA at 3 METs or more was expressed in Exercise (Ex:METs x hours). While there was no correlation between walking steps and BMD at both regions, Ex was positively associated with FN-BMD. This positive effect remained significant after adjustment for confounding factors.
Walking steps do not provide information on the intensity of the activities in daily living. On the oth-er hand, Ex reflects intensity of the activities. It is suggested that FN-BMD has a much closer relation- ship with the intensity of PA than daily steps in postmenopausal Japanese women.

Research Products

• [Journal Article] Cohort Profile: The Japanese Population-based Osteoporosis (JPOS) Cohort Study (2014)
  • Author(s): Iki M, Tamaki J, Sato Y, Kadowaki E, Morita A, Ikeda Y, Kajita E, Nishino H, Matsukura T, Yamagami T, Kitagawa J, Akiba T
  • Journal Title: International Journal of Epidemiology Volume: 印刷中
  • Peer Reviewed
• [Journal Article] Cohort Profile : The Japanese Population-based Osteoporosis (JPOS) Cohort Study
  • Author(s): Iki M, Tamaki J, Sato Y, Kadowaki E, Morita A, Ikeda Y, Kajita E, Nishino H, Matsukura T, Yamagami T, Kitagawa J, Akiba T
  • Journal Title: Int. J. Epidemiol Volume: (印刷中)
  • Peer Reviewed
• [Presentation] 3軸加速度計による身体活動の量およびその強度と大腿骨頸部骨密度との関係 : 閉経後女性を対象とした検討 (2013)
  • Author(s): 北川 淳
  • Organizer: 第21回日本運動生理学会
  • Place of Presentation: 東京国際大学(埼玉県川越市)
  • Year and Date: 2013-07-27
• [Presentation] 3軸加速度計による身体活動の量およびその強度と大腿骨頸部骨密度との関係：閉経後女性を対象とした検討 (2013)
  • Author(s): 北川 淳
  • Organizer: 第21回日本運動生理学会
  • Place of Presentation: 東京国際大学，川越市
• [Presentation] Association between bone mineral density at femoral neck and physical activity assessed with a triaxial accelerometer in postmenopausal Japanese women (2012)
  • Author(s): Kitagawa J, Iki M, ほか7名
  • Organizer: IOF- ECCEO12 : European Congress on Osteoporosis & Osteoarthritis
  • Place of Presentation: Bordeaux, France
  • Year and Date: 2012-03-27
• [Presentation] 閉経後女性における握力と大腿骨頸部骨密度は骨格筋量を介して関連している (2012)
  • Author(s): 立木隆広，北川 淳，高平尚伸，伊木雅之，玉置淳子，梶田悦子，佐藤裕保，鏡森定信，香川芳子，米島秀夫
  • Organizer: 第14回日本骨粗鬆症学会
  • Place of Presentation: 新潟市
• [Presentation] Association between bone mineral density at femoral neck and physical activity assessed with a triaxial accelerometerin postmenopausal Japanese women (2012)
  • Author(s): Kitagawa J, Iki M, Tamaki J, Kouda K, DongMei N, Sato Y, Tachiki T, Murakami Y, Takahira N
  • Organizer: IOF- ECCEO12 : European Congress on Osteoporosis & Osteoarthritis
  • Place of Presentation: ボルドー国際会議場（フランス）
• [Remarks] JPOS Study のホームページ
  • URL: http://www.med.kindai.ac.jp/pubheal/jpos/index.html
• [Remarks] The JPOS Study
  • URL: http://www.med.kindai.ac.jp/pubheal/jpos/index.html