Synergistic Effects of Green Tea Extract and Ginger Supplementation on Endurance Performance and Thermal Perception in Normal and Cold Environments: A Randomized Crossover Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 16
- 试验地点
- 1
- 主要终点
- Time to Exhaustion (TTE)
研究概览
简要总结
This study investigates the effects of green tea extract and ginger supplementation, both individually and in combination, on endurance performance, metabolism, thermal comfort, and muscle soreness in recreationally active young men. Participants will complete cycling tests under both normal room temperature (21-24°C) and cold (5-7°C) conditions. The study uses a randomized, double-blind, placebo-controlled, crossover design to compare the outcomes of placebo, green tea, ginger, and combined supplementation. The findings may help to identify nutritional strategies that improve exercise performance and comfort in different environmental conditions.
详细描述
This randomized, double-blind, placebo-controlled, crossover trial is designed to evaluate the effects of green tea extract and ginger supplementation, both individually and in combination, on endurance performance, metabolic responses, thermal sensation, and muscle soreness in recreationally active men.
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Other
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Male participants aged 18-35 years
- •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
排除标准
- •History of cardiovascular, respiratory, metabolic, or neurological disorders
- •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
结局指标
主要结局
Time to Exhaustion (TTE)
时间窗: Immediately during each exercise test session (after supplement ingestion, under normal and cold environmental conditions)
Endurance performance assessed as the total time in seconds participants are able to maintain cycling at 70% of VO₂max on a cycle ergometer, until volitional exhaustion defined as the inability to sustain a cadence of 60 rpm for 10 consecutive seconds
次要结局
未报告次要终点
研究者
Süleyman Ulupınar
Associate Professor of Exercise Physiology
Erzurum Technical University