Dose jump exercise induce high bone strength under food restriction conditions?

2019 Fiscal Year Final Research Report

• Project/Area Number: 18K17843
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 59020:Sports sciences-related
• Research Institution: Tsu City College
• Principal Investigator: Aikawa Yuki 三重短期大学, 生活科学科, 講師 (10815749)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Keywords: ジャンプ / 骨量 / Female athlete triad / ダイエット / 食事制限

Outline of Final Research Achievements

We examined the effect of jump exercise on bone parameters in young female rats under food restriction. Seven-week-old female rats were divided into four groups: a sedentary and ad libitum feeding group, a jump exercise and ad libitum feeding group, a sedentary and 30% food restriction group, and a jump exercise and 30% food restriction group.There were no interactions of jump exercise and food restriction on bone. Jump exercise under food restriction conditions induced higher bone strength, bone mineral content, bone area, bone mineral density (BMD), and cortical bone volume, similar to rats under ad libitum feeding conditions.BMD, bone size, and bone mass in the food restriction groups did not reach the levels of those in the ad libitum conditions group with jump exercise. Our study reveals jump exercise attenuates loss of biomechanical properties and some bone sites with food restriction.

Free Research Field

運動栄養学

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は動物実験であるが、ジャンプ運動を行う競技者は骨強度低下の危険が走競技者より少ない可能性を示す知見になり得る。また、健康教育を行う際、食事量不足者に対する骨強度増加策としてジャンプ運動が有効である可能性を示す知見になり得る。