Effect of a Single Dose of Green Tea Polyphenols on the Blood Markers of Exercise-Induced Oxidative Stress in Soccer Players

Jówko, Ewa; Sacharuk, Jarosław; Bałasińska, B.; Wilczak, Jacek; Charmas, Małgorzata; Ostaszewski, Paweł; Charmas, Robert

doi:10.1123/ijsnem.22.6.486

Cited by 49 publications

(68 citation statements)

References 44 publications

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“…The results from recent studies have shown that green tea catechins can affect levels of ROS [79][80][81][82], increase levels of antioxidants [83][84][85][86], decrease levels of inflammatory substances [87,88], and increase TAC (TAS) [84,86,87]. An excellent summary of earlier studies that measured ROS and TAC can be found in a chapter by Serafini et al 2011 [67].…”

Section: Oxidative Stressmentioning

confidence: 97%

An Update on the Health Benefits of Green Tea

Reygaert

2017

Beverages

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Abstract:Green tea, which is produced from the leaves of the Camellia sinensis plant, is one of the most popular beverages worldwide. Over the past 30 years or more, scientists have studied this plant in respect to potential health benefits. Research has shown that the main components of green tea that are associated with health benefits are the catechins. The four main catechins found in green tea are: (−)-epicatechin (EC), (−)-epicatechin-3-gallate (ECG), (−)-epigallocatechin (EGC), and (−)-epigallocatechin-3-gallate (EGCG). Of these four, EGCG is present in the largest quantity, and so has been used in much of the research. Among the health benefits of green tea are: anticarcinogenic, anti-inflammatory, antimicrobial, and antioxidant properties, and benefits in cardiovascular disease and oral health. Research has been carried out using various animal models and cells lines, and is now more and more being carried out in humans. This type of research will help us to better understand the direct benefits of green tea. This review will focus primarily on research conducted using human subjects to investigate the health benefits of green tea.

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Section: Oxidative Stressmentioning

confidence: 97%

An Update on the Health Benefits of Green Tea

Reygaert

2017

Beverages

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“…Some human studies have shown positive effects for endurance including V02 max [145], fat oxidation, and insulin sensitivity [146] in an untrained population; however, studies on trained subjects are yet to show benefits [147–149]. It is unlikely that supplemental catechins would be beneficial to ultra-endurance performance.…”

Section: Reviewmentioning

confidence: 99%

Nutritional implications for ultra-endurance walking and running events

Williamson

2016

Extrem Physiol Med

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This paper examines the various nutritional challenges which athletes encounter in preparing for and participating in ultra-endurance walking and running events. Special attention is paid to energy level, performance, and recovery within the context of athletes’ intake of carbohydrate, protein, fat, and various vitamins and minerals. It outlines, by way of a review of literature, those factors which promote optimal performance for the ultra-endurance athlete and provides recommendations from multiple researchers concerned with the nutrition and performance of ultra-endurance athletes. Despite the availability of some research about the subject, there is a paucity of longitudinal material which examines athletes by nature and type of ultra-endurance event, gender, age, race, and unique physiological characteristics. Optimal nutrition results in a decreased risk of energy depletion, better performance, and quicker full-recovery.

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“…They concluded that dietary supplementation with GTE may provide protection against oxidative damage induced by both short-term muscular endurance test and long-term strength training. In another Jówko et al's study [19], green tea catechins-treated soccer players were able to perform a higher number of lift repetitions during the muscle endurance test, but none of the analyzed plasma biomarkers was affected by the ingestion of green tea catechins, suggesting that a 640 mg dose was too low to attenuate exercise-induced oxidative stress and muscle damage. Hodgson et al [24] found that in healthy physically active men, GTE enhanced lipolysis and fat oxidation when compared to placebo, but only under resting conditions, whereas no effect of GTE was seen during exercise.…”

Section: Introductionmentioning

confidence: 99%

Blood serum DSC analysis of well-trained men response to CrossFit training and green tea extract supplementation

Michnik

Sadowska-Krępa

Domaszewski

et al. 2017

J Therm Anal Calorim

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Differential scanning calorimetry (DSC) has been used for the detection of post-exercise changes in blood serum resulting from participation in the CrossFit (CF) training combined with green tea extract (GTE) supplementation. Blood samples from 20 well-trained men were collected at rest, immediately post-exercise and after 1 h of recovery in two trials: first before and second after CF training combined with GTE or placebo administration in the supplemented (S) and control (C) groups, respectively. Selected muscle damage biomarkers have been compared in different phases of the experiment. A significant increase in blood lactate content has been observed post-exercise in both trials in both participants' groups. The opposite trends have been noted for the C and S groups in creatine kinase (CK) activity changes recorded during the first to the second trial: an increase in CK for the control and a decrease for the supplemented group in all phases of the experiment: pre-exercise, post-exercise and after recovery. In the second trial, all CK values for the S group have been found significantly lower than the corresponding values recorded in the C group. These results suggest a mitigate effect of GTE supplementation on post-training muscle damage. DSC results did not reveal clear effects of training nor GTE supplementation on serum denaturation transition. However, interesting dependences of thermodynamic parameters describing this transition have been observed in different phases of the experiment. Statistically significant negative correlations have been found between post-training VO 2max and post-exercise thermodynamic parameters associated with haptoglobin contribution to serum denaturation transition.

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Effect of a Single Dose of Green Tea Polyphenols on the Blood Markers of Exercise-Induced Oxidative Stress in Soccer Players

Abstract: Acute ingestion of GTP (640 mg) does not attenuate exercise-induced oxidative stress and muscle damage.

Cited by 49 publications

References 44 publications

An Update on the Health Benefits of Green Tea

An Update on the Health Benefits of Green Tea

Nutritional implications for ultra-endurance walking and running events

Blood serum DSC analysis of well-trained men response to CrossFit training and green tea extract supplementation

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