Matcha green tea drinks enhance fat oxidation during brisk walking in females

Willems, Mark E. T., Sahin, Akif and Cook, Matthew D. (2018) Matcha green tea drinks enhance fat oxidation during brisk walking in females. International Journal of Sport Nutrition and Exercise Metabolism, 28 (5). pp. 536-541. ISSN 1543-2742

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Abstract

Intake of the catechin epigallocatechin gallate and caffeine has been shown to enhance exercise-induced fat oxidation. Matcha green tea powder contains catechins and caffeine and is consumed as a drink. We examined the effect of Matcha green tea drinks on metabolic, physiological and perceived intensity responses during brisk walking. Thirteen females (age: 27±8 yr, body mass: 65±7 kg, height: 166±6 cm) volunteered. Resting metabolic equivalent (1-MET) was measured using Douglas bags (1-MET: 3.4±0.3 ml·kg-1·min-1). Participants completed an incremental walking protocol to establish the relationship between walking speed and oxygen uptake and individualize the walking speed at 5- or 6-MET. A randomized cross-over design was used with participants tested between day 9 and 11 of the menstrual cycle (follicular phase). Participants consumed 3 drinks (each drink made with 1 gram of Matcha premium grade, OMGTea Ltd UK) the day before, and 1 drink 2 hours before the 30-min walk at 5- (n=10) or 6-METs (walking speed: 5.8±0.4 km·h-1) with responses measured at 8-10, 18-20 and 28-30 min. Matcha had no effect on physiological and perceived intensity responses. Matcha resulted in lower respiratory exchange ratio (control: 0.84±0.04; Matcha: 0.82±0.04) (P < 0.01) and enhanced fat oxidation during a 30-min brisk walk (control: 0.31±0.10; Matcha: 0.35±0.11 g·min-1) (P < 0.01). Matcha green tea drinking can enhance exercise-induced fat oxidation in females. However, when regular brisk walking with 30-min bouts is being undertaken as part of a weight loss program, the metabolic effects of Matcha should not be overstated.

Item Type: Article
Uncontrolled Keywords: catechins, health promotion, treadmill walking, Nutrition and Dietetics, Medicine (miscellaneous), Orthopedics and Sports Medicine, General Medicine
Subjects: Q Science > QP Physiology
Divisions: Research Centres > CCASES
Departments > Sport and Exercise Sciences
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Depositing User: Mark Willems
Date Deposited: 13 Dec 2017 15:35
Last Modified: 18 Oct 2018 15:01
URI: http://eprints.chi.ac.uk/id/eprint/3188

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