Effects of Short-Term Olive Leaf Extract Supplementation in Elite Male Handball Players
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 18
- 试验地点
- 1
- 主要终点
- Muscle Soreness
研究概览
简要总结
Olive leaf extract (OLE) is a natural supplement rich in phenolic compounds, especially oleuropein, which has antioxidant properties that may support recovery after physical exercise. While OLE has been studied for various health-related effects, its potential impact on exercise recovery and performance in elite athletes remains unclear.
This randomized, double-blind, placebo-controlled study was designed to evaluate the effects of four weeks of OLE supplementation on physical performance, sleep quality, and post-exercise muscle soreness in elite male handball players aged 18 to 25 years. Participants were randomly assigned to receive either a daily OLE supplement (500 mg, standardized to 25% oleuropein) or a placebo for four weeks. Physical performance, sleep quality, and muscle soreness were assessed at baseline, during the intervention, and at the end of the study period. Muscle soreness was additionally evaluated at 12 and 24 hours following exercise sessions.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- Triple (Participant, Care Provider, Investigator)
盲法说明
double blind (participant investigator)
入排标准
- 年龄范围
- 18 Years 至 25 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •Male elite handball players aged 18 years or older
- •Free from any diagnosed chronic disease, as determined by medical history
- •Not following a calorie-restricted diet within the previous six months
- •No use of nutritional supplements within the previous six months
排除标准
- •Age under 18 years
- •Smoking or alcohol consumption
- •Presence of any diagnosed chronic disease
- •Adherence to a regular calorie-restricted diet within the previous six months
- •Use of nutritional supplements during the previous six months
研究组 & 干预措施
Study group
olive leaf extract supplemented
干预措施: Olive leaf extract (Dietary Supplement)
Control group
placebo capsule supplemented
干预措施: Placebo (Other)
结局指标
主要结局
Muscle Soreness
时间窗: Baseline, After intervention (two week later), After intervention (fourt week later)
The severity of muscle soreness will be assessed using the Visual Analog Scale (VAS). Patients choose the appropriate score between 0 and 10. Higher scores indicate higher muscle soreness levels.
Squat jump height
时间窗: Performance outcomes were assessed at baseline, week 2, and week 4 of the intervention period.
Lower-body explosive performance was assessed using the squat jump test. Jump height was measured in centimeters (cm) with higher values indicating better explosive performance.
Peak anaerobic power
时间窗: baseline, week 2, and week 4.
Peak anaerobic power was assessed using the Wingate anaerobic test. Peak power output was recorded in watts (W) during the 30-second maximal cycling test. Higher values indicate greater anaerobic power.
Countermovement jump height
时间窗: Assessments were conducted at baseline, week 2, and week 4. Higher values indicate better explosive performance.
Lower-body explosive performance was assessed using the countermovement jump test. Jump height was measured in centimeters (cm) with higher values indicating better explosive performance.
Mean anaerobic power
时间窗: Baseline, week 2, and week 4
Mean anaerobic power was assessed using the Wingate anaerobic test. Mean power output was calculated as the average power produced over the 30-second test and recorded in watts (W). Higher values indicate better anaerobic capacity.
Fatigue index
时间窗: Baseline, week 2, and week 4
Fatigue index was assessed using the Wingate anaerobic test and calculated as the percentage decline in power output from peak to minimum power during the 30-second test. Higher values indicate greater fatigue.
次要结局
- Sleep quality(Total PSQI scores were recorded at baseline, week 2, and week 4 to evaluate changes in perceived sleep quality during the supplementation period.)
研究者
Büşra Demirer
Dr. Research Assistant, Nutritients
Karabuk University