Research Laboratory: Education, Motricité, Sport et Santé, EM2S, LR19JS01, High Institute of Sport and Physical Education, University of Sfax, Tunisia.
Faculté de Médecine Monastir, l'Unité de Recherche 99/UR/08-27, Technologie et Imagerie Médicale, Monastir, Tunisia.
J Am Coll Nutr. 2021 Jan;40(1):61-69. doi: 10.1080/07315724.2020.1735571. Epub 2020 Mar 3.
To assess the effect of beetroot juice (BET) on recovery kinetics of physical performance, muscle damage and perceived muscle soreness after simulated soccer match play in soccer players.
In a randomized, double-blind, crossover design, thirteen soccer players completed the Loughborough Intermittent Shuttle Test LIST. Players received either BET or placebo (PLA) (2*150) for 7 days (3 days pre-exercise, on the day trial, and 3 days post-exercise). Physical performance (Squat jump: SJ, countermovement jump: CMJ, maximal voluntary contraction: MVC, and 20 meters sprint: SP), blood markers of muscle damage (creatine kinase: CK, Lactate dehydrogenase: LDH), inflammatory parameter (C-reactive protein: CRP) and perceived muscle soreness (DOMS) were assessed at baseline, 0 h, 24 h, 48 h and 72 h following the exercise.
Following the LIST, a decrease was observed in CMJ, MVC and SP at 0 h, 24 h, 48 h in both conditions (p < 0.05). However, compared to PLA session, this decrease was significantly attenuated with BET for CMJ at 24 h and at 48 h and for MVC at 0 h, 24 h, 48 h and for SP at 48 h after the LIST (p < 0.05). Likewise, DOMS values were significantly lower with BET compared to PLA condition immediately and at 24 h after exercise.CK, LDH and CRP levels increased at 0 h and at 24 h post exercise in both conditions (p < 0.05), but without any significant difference between the two condition (p > 0.05).
The results of the present study suggest that chronic beetroot juice supplementation reduces post exercise perceived muscle soreness and maintain better performance during the recovery period in soccer players.
评估甜菜根汁（BET）对足球运动员模拟足球比赛后身体机能恢复、肌肉损伤和肌肉酸痛感知的影响。
在一项随机、双盲、交叉设计中，13 名足球运动员完成了莱斯特间歇性穿梭测试（Loughborough Intermittent Shuttle Test，LIST）。运动员在 7 天内（运动前 3 天、试验当天和运动后 3 天）分别接受 BET 或安慰剂（PLA）（2*150）。在基线、运动后 0 小时、24 小时、48 小时和 72 小时，评估身体机能（深蹲跳：SJ、纵跳：CMJ、最大自主收缩：MVC 和 20 米冲刺：SP）、肌肉损伤的血液标志物（肌酸激酶：CK、乳酸脱氢酶：LDH）、炎症参数（C 反应蛋白：CRP）和肌肉酸痛感知（DOMS）。
在 LIST 后，两种情况下的 CMJ、MVC 和 SP 在 0 小时、24 小时和 48 小时都有所下降（p<0.05）。然而，与 PLA 相比，BET 在 LIST 后 24 小时和 48 小时的 CMJ 和 MVC，以及 48 小时的 SP 中，这种下降明显减弱（p<0.05）。同样，与 PLA 条件相比，BET 条件下的 DOMS 值在运动后即刻和 24 小时明显降低。CK、LDH 和 CRP 水平在两种情况下均在运动后 0 小时和 24 小时升高（p<0.05），但两种情况下无显著差异（p>0.05）。
本研究结果表明，慢性甜菜根汁补充可减少足球运动员运动后肌肉酸痛感知，并在恢复期维持更好的表现。
