The creation of baseline values for physical activity length is necessary to maintain healthy bone mass and improve overall health.

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K10910
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 58070:Lifelong developmental nursing-related
• Research Institution: Aomori University of Health and Welfare
• Principal Investigator: LEE SANGUN 青森県立保健大学, 健康科学部, 教授 (30325914)
• Co-Investigator(Kenkyū-buntansha): 藤田 智香子 青森県立保健大学, 健康科学部, 准教授 (80199330) ; 橋本 淳一 青森県立保健大学, 健康科学部, 講師 (90448613)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 予防医学 / 骨密度 / 女性 / 身体活動

Outline of Final Research Achievements

In this study, body composition and physical activity intensity (PAL) were examined to calculate indices of physical activity required for maintaining healthy bone mass and bone improvement in women. The subjects were healthy young women who had reached maximum bone mass and were classified into low bone mineral density (BMD) and high BMD groups using the bone index OSI. PAL in daily life, including exercise, was measured for one week and evaluated at eight levels according to METs classification; BMD was suggested to be related to body composition and physical fitness, but was not affected by physical activity time. On the other hand, the study suggested the importance of activity intensity of 6 METs, which corresponds to moderate intensity, for positive effects on BMD.

Free Research Field

予防医学

Academic Significance and Societal Importance of the Research Achievements

骨は20歳前後で最大骨量に達し、その後は加齢に伴って減少する。従って将来の健常な骨を維持するためには、最大骨量に達する20歳前後まで高い骨量が求められ、その重要な因子として骨への負荷が挙げられている。さらに女性において加齢に伴う骨量減少や骨の関連疾患は社会的な課題とされ、その解決が求めれている。
そこで、本研究では女性の骨に関する予防医学の知見を求め、運動を含む日常生活における身体活動が中強度以上であることが望ましい結果を得た。我々が示した本研究の結果は、若年女性における最大骨量の獲得や骨維持、改善に求められる運動強度の指標になり得る。