Matcha Green Tea Effects at Rest and During Moderate-intensity Exercise in Females

Not Applicable

Completed

• Conditions: No Condition
• Interventions: Dietary Supplement: Placebo; Dietary Supplement: Matcha green tea

• Registration Number: NCT05882942
• Lead Sponsor: University of Chichester

Brief Summary

Intake of the green tea catechin epigallocatechin (EGCG) increased fat oxidation during walking. It is also known to reduce blood pressure and improve body composition. This research will expand the insight on the effects by Matcha green tea supplementation and address the effects on heart rate variability, substrate oxidation at rest, and cardiovascular responses at rest in addition to metabolic and physiologic responses for a 1-hr walk in healthy females.

Detailed Description

Intake of the catechin epigallocatechin (EGCG) increased fat oxidation during walking. It is also known to reduce blood pressure and improve body composition. EGCG is the most abundant and potent bioactive compound (50-80% of the total catechin content) found in Matcha green tea (MGT) and is usually consumed as a drink or in a capsulated from unfermented tea leaves. MGT polyphenols have antioxidant and anti-inflammatory properties, providing numerous health benefits, such as the reduced risk of type 2 diabetes and obesity. MGT supplementation (3g over a 24hr period) has been shown to enhance fat oxidation during 30-min brisk walking as well as lower respiratory exchange ratio in females. Understanding the effectiveness of the bioactive compounds found in natural food sources in improving human health is key to informing the general population and the public health policies preceding them; the daily consumption of drinks and food naturally high in EGCG content could be recommended as an essential part of a healthy lifestyle. This research will expand the insight on Matcha green tea supplementation address the effect on heart rate variability, substrate oxidation at rest, and cardiovascular responses at rest in addition to metabolic and physiologic responses for a 1-hr walk in healthy females.

Study Timeline

• Study Start: 2023-03-03
• Study First Submitted: 2023-05-17
• Study First Submitted QC: 2023-05-26
• Study First Posted: 2023-05-31
• Primary Completion: 2023-07-26
• Study Completion: 2023-08-15
• Status Verified: 2024-05
• Last Update Submitted: 2024-05-07
• Last Update Posted: 2024-05-08

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 8

Inclusion Criteria

• healthy
• non-smokers
• not taking any supplements
• no known allergy to green tea

Exclusion Criteria

• smokers
• known high blood pressure
• on medication

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Placebo	Placebo	Participants will be supplemented with a placebo.
Matcha green tea	Matcha green tea	Participants will be supplemented with Matcha green tea.

Primary Outcome Measures

Name	Time	Method
Cardiac output	Three weeks	Measurement of cardiac output in liters per minute
Fat oxidation	Three weeks	Measurement of fat oxidation in grams/minute
Carbohydrate oxidation	Three weeks	Measurement of carbohydrate oxidation in grams/minute
Stroke volume	Three weeks	Measurement of stroke volume in milliliters
Heart rate variability	Three weeks	Measurement of root mean square of standard deviation of RR intervals
Total peripheral resistance	Three weeks	Measurement of total peripheral resistance in (mmHg x min) / mL

Trial Locations

Locations (2)

Mark Willems; 🇬🇧 Chichester, West Sussex, United Kingdom

University of Chichester; 🇬🇧 Chichester, United Kingdom