期刊
JOURNAL OF PHYSIOLOGICAL SCIENCES
卷 71, 期 1, 页码 -出版社
BMC
DOI: 10.1186/s12576-021-00821-1
关键词
Liver; Muscle; Glycogen; Post-absorptive exercise; Post-prandial exercise
类别
资金
- Japan Society for the Promotion of Science [16H07476]
- Grants-in-Aid for Scientific Research [16H07476] Funding Source: KAKEN
This study compared the effects of exercising at different times on liver and muscle glycogen levels, showing significant differences in diurnal variations. The results will be beneficial for future research on energy metabolism.
It has been suggested that glycogen functions not only in carbohydrate energy storage, but also as molecular sensors capable of activating lipolysis. This study aimed to compare the variation in liver and muscle glycogen during the day due to different timing of exercise. Nine healthy young men participated in two trials in which they performed a single bout of exercise at 70% of their individual maximal oxygen uptake for 60 min in the post-absorptive (morning) or post-prandial (afternoon) state. Liver and muscles glycogen levels were measured using carbon magnetic resonance spectroscopy (C-13 MRS). Diurnal variations in liver and muscle glycogen compared to baseline levels were significantly different depending on the timing of exercise. The effect of the timing of exercise on glycogen fluctuation is known to be related to a variety of metabolic signals, and the results of this study will be useful for future research on energy metabolism.
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