2017Journal article
Mark E. T. Willems, Julianne Doherty, Sam David Blacker
Medicine & Science in Sports & Exercise
Matcha is powder made from green tea leaves that had restricted light exposure to enhance composition. Consumption of the powder in Matcha green tea drinks ensures substantially higher intake of catechins and caffeine than normally brewed green tea. Green tea effects are commonly examined with epigallocatechin gallate (EGCG) or green tea extract with evidence to support enhanced fat oxidation and increased endurance performance. The metabolic and physiologic responses of short-duration intake of Matcha green tea powder during exercise are not known. PURPOSE: To examine the metabolic and physiological responses of Matcha green tea powder during submaximal treadmill running. METHODS: Twelve male recreational runners (mean±SD, age: 31±9 years, height: 185±9 cm, body mass: 79±11 kg, maximum oxygen uptake (V[Combining Dot Above]O2max): 55±6 mL[BULLET OPERATOR]kg-1[BULLET OPERATOR]min-1) completed a 40-minute treadmill run at 55% of the running speed at V[Combining Dot Above]O2max, i.e. running at 10.0±0.8 km[BULLET OPERATOR]h-1. In the Matcha condition, participants were supplemented with 3x3 capsules on the day before and 3 capsules one hour before exercise in a fasted state. Each capsule contains 77 mg total catechins of which 37.5 mg EGCG and 12 mg caffeine. Expired air, heart rate and rating of perceived exertion (RPE) were collected at 10-minute intervals and analysed with two-way repeated measures and Bonferroni post hoc testing. Significance was accepted at p<0.05. RESULTS: There was no condition effect of Matcha green tea powder at any time point on minute ventilation, oxygen consumption, fat oxidation, carbohydrate oxidation, heart rate and RPE. For example, fat oxidation values and heart rates during 9-10 min, 19-20 min, 29-30 min and 39-40 min were 0.63±18,…
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Mark E. T. Willems, Julianne Doherty, Sam David Blacker. (2017). No Adverse Effects of Matcha Green Tea Powder on Metabolic and Physiological Responses during Running. Medicine & Science in Sports & Exercise. https://doi.org/10.1249/01.mss.0000519525.22220.30
DOI: 10.1249/01.mss.0000519525.22220.30
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