Effects of glucose ingestion at different frequencies on glycogen recovery in mice during the early hours post exercise

Journal of the International Society of Sports Nutrition

Hideo Hatta¹  Kenya Takahashi¹  Yumiko Takahashi¹  Yutaka Matsunaga¹ 

[1] Department of Sports Sciences, The University of Tokyo, 3–8–1 Komaba, Meguro–ku, 153–8902, Tokyo, Japan;

关键词: Glycogen recovery;    Skeletal muscle;    Liver;    Glucose metabolism;   

DOI  :  10.1186/s12970-021-00467-9

来源: Springer

【 摘 要 】

BackgroundWhen a high-carbohydrate diet is ingested, whether as small frequent snacks or as large meals, there is no difference between the two with respect to post-exercise glycogen storage for a period of 24 h. However, the effect of carbohydrate intake frequency on glycogen recovery a few hours after exercise is not clear. Athletes need to recover glycogen quickly after physical exercise as they sometimes exercise multiple times a day. The aim of this study was to determine the effect of carbohydrate intake at different frequencies on glycogen recovery during the first few hours after exercise.MethodsAfter 120 min of fasting, 6-week-old male ICR mice were subjected to treadmill running exercise (20 m/min for 60 min) to decrease the levels of muscle and liver glycogen. Mice were then given glucose as a bolus (1.2 mg/g of body weight [BW], immediately after exercise) or as a pulse (1.2 mg/g of BW, every 15 min × 4 times). Following this, the blood, tissue, and exhaled gas samples were collected.ResultsIn the bolus group, blood glucose concentration was significantly lower and plasma insulin concentration was significantly higher than those in the pulse group (p < 0.05). The plantaris muscle glycogen concentration in the bolus group was 25.3% higher than that in the pulse group at 60 min after glucose ingestion (p < 0.05). Liver glycogen concentration in the pulse group was significantly higher than that in the bolus group at 120 min after glucose ingestion (p < 0.05).ConclusionsThe present study showed that ingesting a large amount of glucose immediately after exercise increased insulin secretion and enhanced muscle glycogen recovery, whereas frequent and small amounts of glucose intake was shown to enhance liver glycogen recovery.

【 授权许可】

CC BY