Study on methods to improve physical activity and serum vitamin D deficiency in young women

• Project/Area Number: 15K01531
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Developmental mechanisms and the body works
• Research Institution: Juntendo University
• Principal Investigator: Maruyama Asako 順天堂大学, スポーツ健康科学部, 非常勤助手 (00420878)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 血中ビタミンD / 身体活動・運動 / 若年女性 / 体力 / 屋外 / 身体活動 / 骨強度 / ビタミンD

Outline of Final Research Achievements

Physical activity and serum vitamin D deficiency are serious problems in young women in Japan.In this study, the effectiveness of outdoor physical activity was examined from the effects on serum vitamin D level, bone strength, and physical fitness in young women.
This study suggested that increasing physical activity and exercise greatly contributes to the improvement of bone health and physical fitness. However, in order to raise serum vitamin D efficiently, it is necessary to do outdoor exercise for a long time. Moreover, it was suggested that it is necessary to supplement using vitamin D fortified food depending on the season such as winter.

Academic Significance and Societal Importance of the Research Achievements

本研究は、女性が健やかな一生を送ることができるための心身の健康の維持・増進に向けて、喫緊の問題とされる女性の身体活動不足および血中ビタミンDの不足の解消のための具体的な方策を考案するという点に意義がある。また、本研究の結果から、学校体育および一般市民レベルに対しても生涯にわたって骨粗鬆症や生活習慣病の予防を啓発するための効果的な運動方法を提案することにも繋がると考えている。

Research Products

• [Journal Article] Physical inactivity associated with the risk of non-communicable diseases in Japanese working mothers with young children: A cross-sectional study in Nagano city, Japan. (2017)
  • Author(s): Suzuki Y, Sakuraba K, Shinjo T, Maruyama-Nagao A, Nakaniida A, Kadoya H2, Shibata M2, Matsukawa T, Itoh H, Yokoyama K
  • Journal Title: Experimental and Therapeutic Medicine Volume: 13(6) Issue: 6 Pages: 3103-3108
  • DOI: 10.3892/etm.2017.4311
  • Peer Reviewed / Open Access
• [Journal Article] Level of serum undercarboxylated osteocalcin correlates with bone quality assessed by calcaneal quantitative ultrasound sonometry in young Japanese females (2017)
  • Author(s): Yoshio Suzuki, Asako Maruyama-Nagao, Keishoku Sakuraba, Sachio Kawai
  • Journal Title: Experimental and Therapeutic Medicine Volume: 13（5） Issue: 5 Pages: 1937-1943
  • DOI: 10.3892/etm.2017.4206
  • Peer Reviewed / Open Access
• [Journal Article] Seasonal variations in vitamin D status in indoor and outdoor female athletes (2016)
  • Author(s): Asako Maruyama-Nagao, Keishoku Sakuraba, Yoshio Suzuki
  • Journal Title: Biomedical Reports Volume: 5 Issue: 1 Pages: 113-117
  • DOI: 10.3892/br.2016.671
  • Peer Reviewed / Open Access
• [Presentation] 短期ファスティング・プログラムが腸内細菌叢に与える影響 (2018)
  • Author(s): 新生暁子、櫻庭景植、寶川美月、柴田広大、丸山麻子、鈴木良雄
  • Organizer: 第29回日本臨床スポーツ医学会
• [Presentation] 減量期のたんぱく質量が体組成に及ぼす影響 (2018)
  • Author(s): 柴田広大、櫻庭景植、寶川美月、新生暁子、丸山麻子、鈴木良雄
  • Organizer: 第29回日本臨床スポーツ医学会
• [Presentation] 男子大学生のビタミン栄養状態と骨強度の季節変動 (2017)
  • Author(s): 中嶽 誠、櫻庭景植、鈴木良雄、丸山麻子、青木和浩、山崎紀春
  • Organizer: 第24回日本健康体力栄養学会大会
• [Presentation] 大学男子バスケットボール選手における栄養状態と骨量および骨代謝関連マーカーとの関係 (2015)
  • Author(s): 丸山麻子、桜庭景植、鈴木良雄、中嶽 誠
  • Organizer: 第17回日本骨粗鬆症学会
  • Place of Presentation: 広島国際会議場（広島県・広島市）
  • Year and Date: 2015-09-17