TY - JOUR
T1 - Effects of two different doses of carbohydrate ingestion on taekwondo-related performance during a simulated tournament
AU - Naderi, Alireza
AU - Samanipour, Mohammad Hossein
AU - Sarshin, Amir
AU - Forbes, Scott C.
AU - Koozehchian, Majid S.
AU - Franchini, Emerson
AU - Reale, Reid
AU - Berjisian, Erfan
AU - de Oliveira, Erick P.
AU - Miraftabi, Hossein
AU - Sharafshadeh, Maryam Safari
AU - Rezaei, Sajjad
N1 - Publisher Copyright:
© 2021, The Author(s).
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/5/27
Y1 - 2021/5/27
N2 - Background: Carbohydrate (CHO) ingestion enhances exercise performance; however, the efficacy of CHO intake on repeated bouts of exercise simulating a taekwondo tournament is unknown. Therefore, the purpose was to compare the effects of two different doses of CHO on a sports-specific kicking test during a simulated taekwondo tournament compared to placebo (PLA). Methods: In a double-blind, randomized-placebo controlled, cross-over trial, eleven junior male professional taekwondo athletes (age: 16 ± 0.8 years, body mass: 55.3 ± 7.3 kg) ingested one of three solutions: (i) high dose (C45): 45 g of CHO (60 g∙h− 1), (ii) low dose (C22.5): 22.5 g of CHO (30 g∙h− 1; both solutions containing 2:1 glucose:fructose), or a PLA immediately following each kicking test. The kicking test was repeated 5 times, separated by 45 mins of rest, simulating a typical taekwondo competition day. Ratings of perceived exertion (RPE) and gastrointestinal discomfort (GI) scores were collected immediately after, and blood glucose before each test. Results: The results revealed that C45 and C22.5 did not improve total, successful, or percentage of successful kicks compared to PLA (p > 0.05). Blood glucose was significantly higher following both CHO conditions compared with PLA across all five tests (p < 0.05). There were no differences between treatments or across tests for RPE (p > 0.05). Conclusion: CHO intake, independent of the dose, did not alter taekwondo kick performance during a simulated taekwondo tournament.
AB - Background: Carbohydrate (CHO) ingestion enhances exercise performance; however, the efficacy of CHO intake on repeated bouts of exercise simulating a taekwondo tournament is unknown. Therefore, the purpose was to compare the effects of two different doses of CHO on a sports-specific kicking test during a simulated taekwondo tournament compared to placebo (PLA). Methods: In a double-blind, randomized-placebo controlled, cross-over trial, eleven junior male professional taekwondo athletes (age: 16 ± 0.8 years, body mass: 55.3 ± 7.3 kg) ingested one of three solutions: (i) high dose (C45): 45 g of CHO (60 g∙h− 1), (ii) low dose (C22.5): 22.5 g of CHO (30 g∙h− 1; both solutions containing 2:1 glucose:fructose), or a PLA immediately following each kicking test. The kicking test was repeated 5 times, separated by 45 mins of rest, simulating a typical taekwondo competition day. Ratings of perceived exertion (RPE) and gastrointestinal discomfort (GI) scores were collected immediately after, and blood glucose before each test. Results: The results revealed that C45 and C22.5 did not improve total, successful, or percentage of successful kicks compared to PLA (p > 0.05). Blood glucose was significantly higher following both CHO conditions compared with PLA across all five tests (p < 0.05). There were no differences between treatments or across tests for RPE (p > 0.05). Conclusion: CHO intake, independent of the dose, did not alter taekwondo kick performance during a simulated taekwondo tournament.
KW - Blood glucose
KW - Combat sports
KW - High-intensity intermittent Exercice
KW - Rating of perceived exertion
UR - http://www.scopus.com/inward/record.url?scp=85107009385&partnerID=8YFLogxK
U2 - 10.1186/s12970-021-00434-4
DO - 10.1186/s12970-021-00434-4
M3 - Article
C2 - 34044858
AN - SCOPUS:85107009385
VL - 18
SP - 1
EP - 8
JO - Journal of the International Society of Sports Nutrition
JF - Journal of the International Society of Sports Nutrition
SN - 1550-2783
IS - 1
M1 - 40
ER -