Three Weeks Daily Intake of Matcha Green Tea Powder Affects Substrate Oxidation during Moderate-Intensity Exercise in Females

Abstract

Artificial green tea extracts may enhance exercise-induced fat oxidation. Natural Matcha green tea consumption involves the ingestion of the powdered green tea leaves. We examined the effects of three weeks daily intake of Matcha green tea powder on substrate oxidation during moderate-intensity exercise in females. Females with a regular menstrual cycle (n=12, age: 28±10 yr, body mass: 69±17 kg, height: 163±6 cm) volunteered to complete an incremental walking test to determine the individual moderate exercise intensity (4 metabolic equivalent) for the subsequent 30-min treadmill walk. The study had a randomized placebo-controlled cross-over design with participants tested between day 9 and 11 of the menstrual cycle

Effects of three-week intake of Matcha green tea powder on heart rate variability metrics

“…The present study, focusing on young- intensity exercise in the present study was 0.75 and comparable to Robinson et al [18] who had a correlation of 0.65. However, in contrast to our previous studies in females by Willems et al [10,11], fat oxidation during moderate-intensity exercise was not enhanced by the intake of Matcha green tea. In the present study, the respiratory exchange ratio during a moderate-intensity exercise of 4-MET was 0.78, suggesting a high habitual preference for a contribution of fat oxidation to the energy demands in our female cohort.…”

“…Matcha intake (1.5 gram daily) for two weeks in young adult healthy males and females provided beneficial changes in fecal microbiota composition [9]. In healthy female cohorts, Matcha green tea drinks over a 24-hr period (4 x 1-gram drinks) and 3-weeks of capsulated Matcha green tea intake (3 x 1 gram/day) enhanced walking-induced fat oxidation during a 30-min moderate-intensity walk [10,11]. Several studies on the effects of green tea on metabolic responses have provided observations on the enhanced fat oxidation in rest (for a review see Hodgson et al [12]).…”

“…Several studies on the effects of green tea on metabolic responses have provided observations on the enhanced fat oxidation in rest (for a review see Hodgson et al [12]). It was likely that the enhanced walking-induced fat oxidation by Matcha green tea [10,11] was due to the combined effects of the catechins and caffeine. The effects of Matcha green tea on the metabolic responses at rest have not been addressed.…”

Enhanced Walking-Induced Fat Oxidation by New Zealand Blackcurrant Extract Is Body Composition-Dependent in Recreationally Active Adult Females

“…It is possible that the mechanisms for enhanced exercise-induced fat oxidation by different supplementations, i.e., Matcha green tea and New Zealand blackcurrant extract, are not similar. The Matcha green tea study by Willems et al [ 22 ] also had recreationally active females as participants and a follow-up study, with the measurement in another laboratory confirming even higher enhanced fat oxidation of 35% by three weeks’ Matcha intake [ 9 ]. Future studies should examine the combined intake of supplementations of which single use has been shown to enhance exercise-induced fat oxidation.…”

“…The energy requirements of moderate-intensity exercise are provided primarily by the oxidation of carbohydrates and lipids [ 1 ]. The relative contribution by the oxidation of carbohydrates and lipids towards the moderate-intensity exercise requirements are affected by dietary intake [ 2 ], training status [ 3 ], sex [ 4 ], exercise modality [ 5 ], environmental conditions [ 6 ], and supplementation (e.g., caffeine [ 7 ], green tea extract [ 8 ], Matcha green tea [ 9 ], New Zealand blackcurrant [ 10 ]). Many studies have examined the factors that contribute to exercise-induced maximal fat oxidation.…”