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Carbohydrate Mouth Rinse Mitigates Mental Fatigue Effects on Maximal Incremental Test Performance, but Not in Cortical Alterations.
Brain Sciences ( IF 3.3 ) Pub Date : 2020-07-29 , DOI: 10.3390/brainsci10080493
Cayque Brietzke 1, 2 , Paulo Estevão Franco-Alvarenga 1, 2 , Raul Canestri 1 , Márcio Fagundes Goethel 1, 3 , Ítalo Vínicius 1 , Vitor de Salles Painelli 1, 4 , Tony Meireles Santos 5 , Florentina Johanna Hettinga 6 , Flávio Oliveira Pires 1, 2
Affiliation  

Detrimental mental fatigue effects on exercise performance have been documented in constant workload and time trial exercises, but effects on a maximal incremental test (MIT) remain poorly investigated. Mental fatigue-reduced exercise performance is related to an increased effort sensation, likely due to a reduced prefrontal cortex (PFC) activation and inhibited spontaneous behavior. Interestingly, only a few studies verified if centrally active compounds may mitigate such effects. For example, carbohydrate (CHO) mouth rinse potentiates exercise performance and reduces effort sensation, likely through its effects on PFC activation. However, it is unknown if this centrally mediated effect of CHO mouth rinse may mitigate mental fatigue-reduced exercise performance. After a proof-of-principle study, showing a mental fatigue-reduced MIT performance, we observed that CHO mouth rinse mitigated MIT performance reductions in mentally fatigued cyclists, regardless of PFC alterations. When compared to placebo, mentally fatigued cyclists improved MIT performance by 2.24–2.33% when rinsing their mouth with CHO during MIT. However, PFC and motor cortex activation during MIT in both CHO and placebo mouth rinses were greater than in mental fatigue. Results showed that CHO mouth rinse mitigated the mental fatigue-reduced MIT performance, but challenged the role of CHO mouth rinse on PFC and motor cortex activation.

中文翻译:

碳水化合物漱口水可减轻心理疲劳对最大增量测试性能的影响,但不适用于皮质改变。

在持续的工作量和计时赛练习中,已记录了对运动表现的有害精神疲劳影响,但对最大增量测试(MIT)的影响仍未得到很好的研究。精神疲劳减少的运动表现与增加的努力感觉有关,这可能是由于前额叶皮层(PFC)激活减少和自发行为受抑制。有趣的是,只有少数研究证实了中枢活性化合物是否可以减轻这种影响。例如,碳水化合物(CHO)漱口水可能通过其对PFC激活的作用来增强运动能力并减少力度感。但是,尚不知道这种CHO漱口水的中枢调节作用是否可以减轻精神疲劳引起的运动表现。经过原理证明研究后,显示出降低了精神疲劳的MIT表现,我们观察到,无论PFC改变如何,CHO漱口水都能缓解精神疲劳骑自行车者的MIT成绩下降。与安慰剂相比,精神疲劳的骑车人在MIT期间用CHO漱口可将MIT的表现提高2.24–2.33%。然而,在CHO和安慰剂漱口水中,MIT期间的PFC和运动皮层激活均大于精神疲劳。结果表明,CHO漱口液可减轻精神疲劳引起的MIT表现,但挑战CHO漱口液对PFC和运动皮层激活的作用。在CHO和安慰剂漱口水中,MIT期间的PFC和运动皮层激活大于精神疲劳。结果表明,CHO漱口液可减轻精神疲劳引起的MIT表现,但挑战CHO漱口液对PFC和运动皮层激活的作用。在CHO和安慰剂漱口水中,MIT期间的PFC和运动皮层激活大于精神疲劳。结果表明,CHO漱口液可减轻精神疲劳引起的MIT表现,但挑战CHO漱口液对PFC和运动皮层激活的作用。
更新日期:2020-07-29
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