2
|
Kondo E, Shiose K, Osawa T, Motonaga K, Kamei A, Nakajima K, Sagayama H, Wada T, Nishiguchi S, Takahashi H. Effects of an overnight high-carbohydrate meal on muscle glycogen after rapid weight loss in male collegiate wrestlers. BMC Sports Sci Med Rehabil 2021; 13:96. [PMID: 34416921 PMCID: PMC8379859 DOI: 10.1186/s13102-021-00325-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 08/12/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Severe rapid weight loss (RWL) induces a decrease in muscle glycogen (mGly). Nevertheless, adequate carbohydrate intake after RWL has not been reported to optimize muscle glycogen following a weigh-in the evening until a wrestling tournament morning. The purpose of this study was to investigate the effect of an overnight high-carbohydrate recovery meal of 7.1 g kg-1 following RWL on mGly concentration. METHODS Ten male elite wrestlers lost 6% of their body mass within 53 h and then subsequently ate three meals, within 5 h, containing total of 7.1 g kg-1 of carbohydrates. mGly was measured by 13C-magnetic resonance spectroscopy before (BL) and after RWL (R0) at 2 h (R2), 4 h (R4), and 13 h (R13) after initiating the meal. Body composition, muscle cross-sectional area, and blood and urine samples were collected at BL, R0, and R13. RESULTS Body mass decreased by 4.6 ± 0.6 kg (p < 0.05) and did not recover to BL levels in R13 (- 1.7 ± 0.6 kg, p < 0.05). Likewise, mGly by 36.5% ± 10.0% (p < 0.05) and then did not reach BL levels by R13 (p < 0.05). CONCLUSION A high-carbohydrate meal of 7.1 g kg-1 after 6% RWL was not sufficient to recover mGly during a 13 h recovery phase. Participating in high-intensity wrestling matches with an mGly concentration below normal levels is maybe undesirable.
Collapse
Affiliation(s)
- Emi Kondo
- Sports Medical Center, Japan Institute of Sports Science, 3-15-1 Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan.
| | - Keisuke Shiose
- Department of Sports Research, Japan Institute of Sports Science, 3-15-1 Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan
| | - Takuya Osawa
- Department of Sports Research, Japan Institute of Sports Science, 3-15-1 Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan
| | - Keiko Motonaga
- Department of Sports Research, Japan Institute of Sports Science, 3-15-1 Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan
| | - Akiko Kamei
- Sports Medical Center, Japan Institute of Sports Science, 3-15-1 Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan
| | - Kohei Nakajima
- Sports Medical Center, Japan Institute of Sports Science, 3-15-1 Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan
| | - Hiroyuki Sagayama
- Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Takahiro Wada
- Faculty of Physical Education, Kokushikan University, 7-3-1 Nagayama, Tama-shi, Tokyo, 206-8515, Japan
| | - Shigeki Nishiguchi
- Faculty of International Studies, Takushoku University, 815-1 Tatemachi, Hachioji-shi, Tokyo, 193-0985, Japan
| | - Hideyuki Takahashi
- Department of Sports Research, Japan Institute of Sports Science, 3-15-1 Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan.,Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| |
Collapse
|