Effects of Alternating Altitude Training Versus Fixed-Altitude Training on Physical Performance and Physiological Adaptations in Elite Race Walkers: A Randomized Controlled Trial
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 发起方
- 入组人数
- 16
- 试验地点
- 1
- 主要终点
- Body Weight
研究概览
简要总结
This randomized controlled trial aims to compare the effects of alternating altitude training and fixed-altitude training on physical performance and physiological adaptations in elite race walkers living at altitude. Elite race walkers from Yunnan Province will be randomly assigned to either an alternating altitude training group or a fixed-altitude training group. The alternating altitude training group will perform selected training sessions under simulated higher-altitude conditions while completing the remaining sessions at their regular altitude training base. The fixed-altitude training group will complete all training sessions at the regular altitude. Physical performance, race walking performance, cardiovascular function, pulmonary function, and hematological parameters will be assessed before and after the intervention to evaluate the effectiveness of the two altitude training strategies.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 26 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Male and female elite race walkers aged 16-26 years. Registered athletes from the Yunnan Provincial Race Walking Team. Long-term residents of high-altitude regions with regular altitude training experience.
- •Healthy and medically cleared to participate in high-intensity training and hypoxic exposure.
- •Able to complete the prescribed training program and all outcome assessments. Provided written informed consent before enrollment. For participants younger than 18 years, written informed consent will also be obtained from a parent or legal guardian.
排除标准
- •Any cardiovascular, respiratory, metabolic, neurological, or other medical condition contraindicating exercise or hypoxic exposure.
- •Musculoskeletal injury or illness affecting normal training or performance within the previous three months.
- •Current use of medications or supplements that may substantially influence physiological adaptation or exercise performance.
- •Failure to complete the intervention or outcome assessments according to the study protocol.
- •Withdrawal of informed consent at any time during the study.
结局指标
主要结局
Body Weight
时间窗: Baseline and immediately after completion of the 4-week intervention.
Body weight measured before and after the training period.
Body Fat Percentage
时间窗: Baseline and immediately after completion of the 4-week intervention.
Body fat percentage measured using bioelectrical impedance or other validated method.
Forced Vital Capacity (FVC)
时间窗: Baseline and immediately after completion of the 4-week intervention.
Forced vital capacity measured using spirometry before and after the intervention.
Maximal Voluntary Ventilation
时间窗: Baseline and immediately after completion of the 4-week intervention.
MVV measured using standard pulmonary function testing protocol pre- and post-intervention.
Left Ventricular Volume
时间窗: Baseline and immediately after completion of the 4-week intervention.
Echocardiography measurement of left ventricular end-diastolic and end-systolic volume.
Ejection Fraction
时间窗: Baseline and immediately after completion of the 4-week intervention.
Echocardiography assessment of left ventricular ejection fraction pre- and post-training.
Myocardial Thickness
时间窗: Baseline and immediately after completion of the 4-week intervention.
Measurement of interventricular septum and left ventricular posterior wall thickness by echocardiography.
Maximal Oxygen Uptake
时间窗: Baseline and immediately after completion of the 4-week intervention.
Pre- and post-intervention measurement of VO₂max using standard exercise testing protocol to assess aerobic capacity
Countermovement Jump Height
时间窗: Baseline and immediately after completion of the 4-week intervention.
Countermovement jump (CMJ) height measured using a validated force platform or jump assessment system to evaluate lower-limb explosive power before and after the intervention.
Squat Jump Height
时间窗: Baseline and immediately after completion of the 4-week intervention.
Squat jump (SJ) height measured using a validated force platform or jump assessment system to assess concentric lower-limb explosive strength before and after the intervention.
Isometric Mid-Thigh Pull Peak Force
时间窗: Baseline and immediately after completion of the 4-week intervention.
Peak force during the isometric mid-thigh pull (IMTP) measured using a force platform to assess maximal isometric lower-limb strength before and after the intervention.
Isometric Mid-Thigh Pull Rate of Force Development
时间窗: Baseline and immediately after completion of the 4-week intervention.
Rate of force development (RFD) during the isometric mid-thigh pull (IMTP) measured using a force platform before and after the intervention.
Reactive Strength Index (RSI)
时间窗: Baseline and immediately after completion of the 4-week intervention.
Reactive Strength Index (RSI) calculated from repeated ankle hops using a force platform or validated jump assessment system to assess lower-limb reactive strength before and after the intervention.
次要结局
- Red Blood Cell Count(Baseline and immediately after completion of the 4-week intervention.)
- Hemoglobin(Baseline and immediately after completion of the 4-week intervention.)
- Hematocrit(Baseline and immediately after completion of the 4-week intervention.)
- Erythropoietin(Baseline and immediately after completion of the 4-week intervention.)
研究者
Chaoran Han
PhD Student
Macao Polytechnic University