The effects of change in liver glycogen on energy metabolism

Research Project

Project/Area Number	16H07476
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Sports science
Research Institution	National Agency for the Advancement of Sports and Health
Principal Investigator	Iwayama Kaito 独立行政法人日本スポーツ振興センター国立スポーツ科学センター, スポーツ研究部, 契約研究員 (30781249)
Project Period (FY)	2016-08-26 – 2018-03-31
Project Status	Completed (Fiscal Year 2017)
Budget Amount *help	¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000) Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords	グリコーゲン / 炭素磁気共鳴分光法 / 炭素磁気共鳴分光装置
Outline of Final Research Achievements	Liver glycogen is not only an energy source but also a trigger of energy metabolism. The purpose of present study was to investigate and compare the diurnal variation in the glycogen concentration of the liver and muscle using carbon magnetic resonance spectroscopy (13C MRS). The changes in the muscle glycogen concentration were small through an experimental period. The larger diurnal variation of the liver glycogen content was shown: the lowest value was observed early in the morning. This results may indicate why exercise performed before breakfast led to increased 24-h fat oxidation.