Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
16 participants
INTERVENTIONAL
2025-03-01
2025-07-30
Brief Summary
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Detailed Description
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Sixteen healthy participants will complete eight experimental conditions: placebo, green tea extract (500 mg), ginger (1 g), and a combination of both, tested under normal (21-24°C) and cold (5-7°C) environments. Each condition will be separated by a washout period to avoid carryover effects.
Endurance capacity will be measured using a time-to-exhaustion cycling test at 70% of maximal oxygen uptake (VO₂max). Metabolic responses will be assessed by gas analysis to determine respiratory exchange ratio (RER). Perceptual measures will include the Borg Rating of Perceived Exertion (RPE) and a thermal sensation scale, while muscle soreness will be evaluated 24 hours post-exercise using a visual analog scale (VAS).
The study aims to determine whether the combined intake of green tea and ginger provides synergistic benefits over individual supplementation, particularly in cold environments where thermoregulation and endurance capacity are challenged. Findings may contribute to practical nutritional strategies that enhance exercise performance, comfort, and recovery under environmental stress conditions.
Conditions
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Study Design
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RANDOMIZED
CROSSOVER
OTHER
TRIPLE
Study Groups
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Placebo Arm
Participants receive a placebo consisting of maltodextrin in capsule form, matched in appearance and taste to the active supplements.
Placebo Arm
Participants receive a placebo consisting of maltodextrin in capsule form, matched in appearance and taste to the active supplements.
Green Tea Extract Arm
Participants receive 500 mg of standardized green tea extract in capsule form.
Green Tea Extract
Participants receive 500 mg of standardized green tea extract in capsule form.
Ginger Arm
Participants receive 1 g of ginger supplement in capsule form.
Ginger
Participants receive 1 g of ginger supplement in capsule form.
Combined Supplement Arm
Participants receive a combination of 500 mg green tea extract and 1 g ginger, both administered in capsule form.
Combined Supplement (Green Tea + Ginger)
Participants receive a combination of 500 mg green tea extract and 1 g ginger, both administered in capsule form.
Interventions
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Placebo Arm
Participants receive a placebo consisting of maltodextrin in capsule form, matched in appearance and taste to the active supplements.
Green Tea Extract
Participants receive 500 mg of standardized green tea extract in capsule form.
Ginger
Participants receive 1 g of ginger supplement in capsule form.
Combined Supplement (Green Tea + Ginger)
Participants receive a combination of 500 mg green tea extract and 1 g ginger, both administered in capsule form.
Eligibility Criteria
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Inclusion Criteria
Recreationally active (≥3 aerobic exercise sessions per week, ≥30 minutes per session, for at least 6 months)
VO₂max between 40-50 mL/kg/min (recreationally active fitness level)
Body mass index within the normal to slightly overweight range (approximately 18.5-27.5 kg/m²)
Willingness to comply with study requirements, including supplementation and exercise testing protocols
Provided written informed consent
Exclusion Criteria
Allergy or intolerance to green tea, ginger, or maltodextrin
Current use of ergogenic supplements, medications affecting metabolism, or stimulants (e.g., beta-blockers, caffeine pills)
Smoking or excessive alcohol consumption (\>14 units per week)
Inconsistent exercise habits (\<3 sessions/week in the past 6 months)
Participation in another clinical trial within the past 3 months
18 Years
35 Years
MALE
Yes
Sponsors
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Erzurum Technical University
OTHER
Responsible Party
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Süleyman Ulupınar
Associate Professor of Exercise Physiology
Locations
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Erzurum Technical University Sport Sciences Faculty
Erzurum, Erzurum, Turkey (Türkiye)
Countries
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References
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Demirli A, Ulupinar S, Terzi M, Ozbay S, Ozkara AB, Gencoglu C, Ouergui I, Ardigo LP. Synergistic Effects of Green Tea Extract and Ginger Supplementation on Endurance Performance and Thermal Perception in Normothermic and Cold Environments: A Randomized, Placebo-Controlled, Double-Blind Crossover Trial. Nutrients. 2025 Sep 13;17(18):2949. doi: 10.3390/nu17182949.
Other Identifiers
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ETU-Green Tea and Ginger
Identifier Type: -
Identifier Source: org_study_id
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