Triviño Alejandro R, Díaz-Romero Carlos, Martin-Olmedo Juan J, Jiménez-Martínez Pablo, Alix-Fages Carlos, Cwiklinska Magdalena, Pérez Daniela, Jurado-Fasoli Lucas
Department of Chemical and Pharmaceutical Technology Engineering, University of La Laguna, Santa Cruz de Tenerife, Spain.
Department of Physiology, Faculty of Medicine, University of Granada, Granada, Spain.
Eur J Appl Physiol. 2025 May;125(5):1337-1347. doi: 10.1007/s00421-024-05689-8. Epub 2024 Dec 13.
Carbohydrate (CHO) intake during exercise could decrease the subjective perceived exertion and promote recovery; however, the effects of intra-training CHO ingestion remain uncertain in CrossFit® (CF) sessions. Therefore, the aim of this randomized, triple-blind, placebo-controlled crossover trial was to investigate the effect of acute CHO intake during a CF session on the delayed onset muscle soreness (DOMS), the perceived exertion (RPE), performance, recovery, and metabolic markers (capillary lactate and glucose) in CF athletes. Twenty-three male athletes trained in CF ingested CHO (60 g of maltodextrin + fructose) or a placebo (PLA) during a CF session. DOMS was assessed 24 and 48 h after the CF session. The Counter Movement Jump (CMJ) test and the Deep Squat test at 70% of the athlete's body weight (AST70) were performed before, immediately after, and 24 h after the session. Perceived exertion, Feeling Scale (FS), Gastrointestinal Distress Score (GDS), heart rate, capillary lactate, and glucose were assessed across the session. CHO supplementation did not improve DOMS (all P ≥ 0.127), CMJ, or AST70 parameters (all P ≥ 0.053) compared to PLA. There were no differences between CHO and PLA in RPE, FS, GDS, heart rate (all P ≥ 0.088), performance (e.g., nº of repetitions; all P ≥ 0.556), or lactate levels (P = 0.810). However, glucose levels increased from the back squat to the WOD and remained stable after the AMRAP (P < 0.001). In conclusion, acute CHO intake during a CF session did not improve DOMS, perceived exertion, performance, recovery, or metabolic markers in CF athletes. TRN: NCT06440343. Date: 2024-05-10.
运动期间摄入碳水化合物（CHO）可降低主观疲劳感并促进恢复；然而，在CrossFit®（CF）训练期间进行训练时摄入CHO的效果仍不确定。因此，这项随机、三盲、安慰剂对照交叉试验的目的是研究在CF训练期间急性摄入CHO对CF运动员延迟性肌肉酸痛（DOMS）、主观疲劳感（RPE）、运动表现、恢复情况以及代谢指标（毛细血管乳酸和葡萄糖）的影响。23名接受CF训练的男性运动员在一次CF训练期间摄入了CHO（60克麦芽糊精+果糖）或安慰剂（PLA）。在CF训练结束后24小时和48小时评估DOMS。在训练前、训练结束后立即以及训练结束后24小时进行反向纵跳（CMJ）测试和以运动员体重70%（AST70）进行深蹲测试。在整个训练过程中评估主观疲劳感、感觉量表（FS）、胃肠道不适评分（GDS）、心率、毛细血管乳酸和葡萄糖。与PLA相比，补充CHO并没有改善DOMS（所有P≥0.127）、CMJ或AST70参数（所有P≥0.053）。在RPE、FS、GDS、心率（所有P≥0.088）、运动表现（例如重复次数；所有P≥0.556）或乳酸水平方面，CHO和PLA之间没有差异（P = 0.810）。然而，从后深蹲到高强度有氧间歇训练（AMRAP）期间葡萄糖水平升高，在AMRAP后保持稳定（P < 0.001）。总之，在CF训练期间急性摄入CHO并没有改善CF运动员的DOMS、主观疲劳感、运动表现、恢复情况或代谢指标。试验注册号：NCT06440343。日期：2024年5月10日。
