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Acute Consumption of Varied Doses of Cocoa Flavanols Does Not Influence Exercise-Induced Muscle Damage.
International Journal of Sport Nutrition and Exercise Metabolism ( IF 2.5 ) Pub Date : 2020-07-08 , DOI: 10.1123/ijsnem.2020-0057
Liam D Corr 1 , Adam Field 1 , Deborah Pufal 1 , Jenny Killey 1 , Tom Clifford 2 , Liam D Harper 1 , Robert J Naughton 1
Affiliation  

Polyphenol consumption has become a popular method of trying to temper muscle damage. Cocoa flavanols (CF) have attracted attention due to their high polyphenol content and palatability. As such, this study will investigate whether an acute dose of CF can aid recovery following exercise-induced muscle damage. The study was a laboratory-based, randomized, single-blind, nutrient-controlled trial involving 23 participants (13 females and 10 males). Participants were randomized into either control ∼0 mg CF (n = 8, four females); high dose of 830 mg CF (CF830, n = 8, five females); or supra dose of 1,245 mg CF (CF1245, n = 7, four females). The exercise-induced muscle damage protocol consisted of five sets of 10 maximal concentric/eccentric hamstring curls and immediately consumed their assigned drink following completion. To measure muscle recovery, maximal voluntary isometric contraction (MVIC) of the knee flexors at 60° and 30°, a visual analog scale (VAS), and lower-extremity function scale were taken at baseline, immediately, 24-, 48-, and 72-hr postexercise-induced muscle damage. There was a main effect for time for all variables (p < .05). However, no significant differences were observed between groups for all measures (p ≥ .17). At 48 hr, there were large effect sizes between control and CF1245 for MVIC60 (p = .17, d = 0.8); MVIC30 (p = .26, d = 0.8); MVIC30 percentage change (p = .24 d = 0.9); and visual analog scale (p = .25, d = 0.9). As no significant differences were observed following the consumption of CF, there is reason to believe that CF offer no benefit for muscle recovery when ingested acutely.



中文翻译:

急性消耗不同剂量的可可黄烷醇不会影响运动引起的肌肉损伤。

多酚消费已成为试图缓解肌肉损伤的流行方法。可可黄烷醇 (CF) 因其高多酚含量和适口性而备受关注。因此,本研究将调查急性剂量的 CF 是否有助于运动引起的肌肉损伤后的恢复。该研究是一项基于实验室、随机、单盲、营养对照试验,涉及 23 名参与者(13 名女性和 10 名男性)。参与者被随机分配到对照组~0 mg CF(n  = 8,四名女性);高剂量 830 mg CF(CF 830n  = 8,五名女性);或超剂量 1,245 mg CF (CF 1245 , n = 7,四名女性)。运动引起的肌肉损伤方案由五组 10 次最大同心/离心腘绳肌弯举组成,完成后立即饮用指定的饮料。为了测量肌肉恢复情况,在 60° 和 30° 时膝关节屈肌的最大自主等长收缩 (MVIC)、视觉模拟量表 (VAS) 和下肢功能量表在基线、立即、24-、48-、和 72 小时运动后引起的肌肉损伤。所有变量的时间都有主效应(p  < .05)。然而,对于所有测量,组间均未观察到显着差异 ( p  ≥ .17)。在48小时,有控制和CF之间的大的效果的大小1245为MVIC60(p  = 0.17,d = 0.8); MVIC30​​(p  = .26,d  = 0.8);MVIC30​​ 百分比变化(p  = .24 d  = 0.9);和视觉模拟量表 ( p  = .25, d  = 0.9)。由于在食用 CF 后没有观察到显着差异,因此有理由相信,当急性摄入 CF 对肌肉恢复没有好处。

更新日期:2020-08-25
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