Diurnal variations in muscle and liver glycogen differ depending on the timing of exercise.

Autor: Iwayama K; Faculty of Budo and Sport Studies, Tenri University, 80 Tainoshocho, Tenri, Nara, 632-0071, Japan. k-iwayama@sta.tenri-u.ac.jp., Tanabe Y; Faculty of Health and Sport Sciences, University of Tsukuba, Ibaraki, Japan., Tanji F; Sport Medical Science Research Institute, Tokai University, Kanagawa, Japan., Ohnishi T; Medical Center, Japan Institute of Sport Sciences, Tokyo, Japan., Takahashi H; Faculty of Health and Sport Sciences, University of Tsukuba, Ibaraki, Japan.
Jazyk: angličtina
Zdroj: The journal of physiological sciences : JPS [J Physiol Sci] 2021 Nov 21; Vol. 71 (1), pp. 35. Date of Electronic Publication: 2021 Nov 21.
DOI: 10.1186/s12576-021-00821-1
Abstrakt: 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 ( 13 C 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.
(© 2021. The Author(s).)
Databáze: MEDLINE
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