Effects of diet therapy using small rice bowl

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K20151
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 59040:Nutrition science and health science-related
• Research Institution: The University of Nagano
• Principal Investigator: Shimpo Misa 長野県立大学, 健康発達学部, 講師 (90827247)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 食事療法 / ナッジ / 食器 / 糖尿病

Outline of Final Research Achievements

This study aimed to investigate the effectiveness of using a smaller rice bowl for diet therapy among Japanese men with type 2 diabetes at one month and three months. As rice contributes the most to the total daily energy intake among Japanese people, this study focused on the size of the rice bowl. The changes in weight and body mass index among the intervention group at one month were significantly higher than those in the control group. There were no significant differences between the intervention and control groups at three months. More participants in the intervention group maintained and had the continuance intention of the intake of rice after three months than those in the control group. This result suggests that the method of using a small rice bowl to control the intake of rice might be easy to follow; however, the effects were not maintained over time.

Free Research Field

栄養教育

Academic Significance and Societal Importance of the Research Achievements

本研究により，小さな茶碗を日常生活で用いた際の1か月および3か月後の体重への効果を示すことができた。これまで，食器の大きさと盛り付け量や喫食量との関連が報告されてきたものの，実験的な手法による1回の食事で検討されており，日常生活において継続的に小さな食器を用いた場合の効果は調べられていなかった。日本においても男性の肥満者の割合は増加傾向にあることから，簡単で効果的な食事管理方法を検討することは重要である。小さな茶碗を与えるという介入は，人件費やコストが高くない取り組みやすい介入である。本研究の結果はエビデンスに基づく効率的かつ効果的な栄養教育の提案へと繋がる。