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Article

Effect of Different Carbohydrate Intakes within 24 Hours after Glycogen Depletion on Muscle Glycogen Recovery in Japanese Endurance Athletes

1
Japan Institute of Sports Sciences, Tokyo 115-0056, Japan
2
Japan Society for the Promotion of Science, Tokyo 102-0083, Japan
3
Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba 305-8574, Japan
4
Faculty of Physical Education, Japan Women’s College of Physical Education, Tokyo 157-8565, Japan
5
Faculty of Education, University of Miyazaki, Miyazaki 889-2192, Japan
6
Faculty of Sport Sciences, Waseda University, Saitama 359-1192, Japan
7
Advanced Research Initiative for Human High Performance (ARIHHP), University of Tsukuba, Tsukuba 305-8574, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Antoni Pons
Nutrients 2022, 14(7), 1320; https://doi.org/10.3390/nu14071320
Received: 12 February 2022 / Revised: 17 March 2022 / Accepted: 17 March 2022 / Published: 22 March 2022
(This article belongs to the Special Issue Effects of Carbohydrate Supplementation on Exercise Performance)
Daily muscle glycogen recovery after training is important for athletes. Few studies have reported a continuous change in muscle glycogen for 24 h. We aimed to investigate the changes in carbohydrate intake amount on muscle glycogen recovery for 24 h after exercise using 13C-magnetic resonance spectroscopy (13C-MRS). In this randomized crossover study, eight male participants underwent prolonged high-intensity exercise, and then consumed one of the three carbohydrate meals (5 g/kg body mass (BM)/d, 7 g/kg BM/d, or 10 g/kg BM/d). Glycogen content of thigh muscle was measured using 13C-MRS before, immediately after, and 4 h, 12 h and 24 h after exercise. Muscle glycogen concentration decreased to 29.9 ± 15.9% by exercise. Muscle glycogen recovery 4–12 h after exercise for the 5 g/kg group was significantly lower compared to those for 7 g/kg and 10 g/kg groups (p < 0.05). Muscle glycogen concentration after 24 h recovered to the pre-exercise levels for 7 g/kg and 10 g/kg groups; however, there was a significant difference for the 5 g/kg group (p < 0.05). These results suggest that carbohydrate intake of 5 g/kg BM/d is insufficient for Japanese athletes to recover muscle glycogen stores 24 h after completing a long-term high-intensity exercise. View Full-Text
Keywords: glycogen; recovery; carbohydrate; 13C-magnetic resonance spectroscopy; exercise; muscle glycogen; recovery; carbohydrate; 13C-magnetic resonance spectroscopy; exercise; muscle
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MDPI and ACS Style

Namma-Motonaga, K.; Kondo, E.; Osawa, T.; Shiose, K.; Kamei, A.; Taguchi, M.; Takahashi, H. Effect of Different Carbohydrate Intakes within 24 Hours after Glycogen Depletion on Muscle Glycogen Recovery in Japanese Endurance Athletes. Nutrients 2022, 14, 1320. https://doi.org/10.3390/nu14071320

AMA Style

Namma-Motonaga K, Kondo E, Osawa T, Shiose K, Kamei A, Taguchi M, Takahashi H. Effect of Different Carbohydrate Intakes within 24 Hours after Glycogen Depletion on Muscle Glycogen Recovery in Japanese Endurance Athletes. Nutrients. 2022; 14(7):1320. https://doi.org/10.3390/nu14071320

Chicago/Turabian Style

Namma-Motonaga, Keiko, Emi Kondo, Takuya Osawa, Keisuke Shiose, Akiko Kamei, Motoko Taguchi, and Hideyuki Takahashi. 2022. "Effect of Different Carbohydrate Intakes within 24 Hours after Glycogen Depletion on Muscle Glycogen Recovery in Japanese Endurance Athletes" Nutrients 14, no. 7: 1320. https://doi.org/10.3390/nu14071320

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