Caffeine Ingestion at Acute and Moderate Doses Does Not Improve Sport Climbing Performance: Results From a Randomized Controlled Trial.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 13
- 试验地点
- 1
- 主要终点
- Pull-up 1RM
研究概览
简要总结
To determine the effects of ingesting caffeine at a dose of 3 mg/kg body mass on pull-up performance and handgrip-related measures in trained climbers.
详细描述
Introduction
Caffeine is widely recognized as a performance-enhancing substance across numerous athletic disciplines; however, its role in sport climbing has received comparatively limited scientific attention. Because climbing performance relies heavily on grip force, explosive upper-body strength, and localized muscular endurance, this investigation evaluated the short-term impact of a low caffeine dose on climbing-relevant performance outcomes.
Objective
To determine the effects of ingesting caffeine at a dose of 3 mg/kg body mass on pull-up performance and handgrip-related measures in trained climbers.
Methods: Thirteen trained young male climbers participated in a triple-blind, randomized, crossover study design, completing two experimental conditions (caffeine and placebo). Performance assessments included a pull-up one-repetition maximum (1RM), a pull-up power test conducted at multiple external loads, a pull-up endurance test, and several grip performance evaluations, namely maximal dead-hang duration, maximal dead-hang force, and rate of force development (RFD).
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Treatment
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
盲法说明
Participants, investigators and statistician
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
- •Healthy individuals
- •Age between 18 and 40 years
- •At least three months of continuous climbing practice
- •Ability to hang for at least 5 seconds from an 18-mm edge
- •Ability to perform at least one strict body-weight pull-up
排除标准
- •Any musculoskeletal or medical condition preventing completion of the experimental protocol
- •Participation in less than three training sessions per week or a total training volume <150 min/week
- •Use of medications or dietary supplements known to affect caffeine metabolism
研究组 & 干预措施
Placebo
0 mg/kg of caffeine
干预措施: Placebo (Dietary Supplement)
Caffeine
3 mg/kg of caffeine
干预措施: Acute and moderate dose of caffeine (3 mg/kg body mass) (Dietary Supplement)
结局指标
主要结局
Pull-up 1RM
时间窗: Through study completion, an average of 4 weeks
Pull-up strength and power test 1
时间窗: Through study completion, an average of 4 weeks
Mean and peak velocity will be recorded at 60%, 80%, 90%, 95% and 100% 1RM.
Pull-up strength and power test 2
时间窗: Through study completion, an average of 4 weeks
Mean and peak power will be recorded at 60%, 80%, 90%, 95% and 100%1RM.
Pull-up muscular endurance test
时间窗: Through study completion, an average of 4 weeks
Using body mass and perform one set of many repetitions as possible until task failure. The total number of repetitions, Vmean, Vpeak, Wmean and Wpeak were recorded.
Grip endurance in dead-hang.
时间窗: Through study completion, an average of 4 weeks
Maximum hanging time (MHT) test at an 18-mm edge depth with each hand
Maximum grip strength in dead-hang
时间窗: Through study completion, an average of 4 weeks
using the Strength Test (ST), which measures the maximal external load a participant can sustain for 5 seconds while hanging from an 18-mm edge
Grip rate of force development (RFD).
时间窗: Through study completion, an average of 4 weeks
measuring the maximal one-hand pull (voluntary contraction) at an 18 mm edge with a force sensor
次要结局
- Body composition(Through study completion, an average of 4 weeks)
- Dietary habits(Through study completion, an average of 4 weeks)
- Physical activity habits(Through study completion, an average of 4 weeks)
- Rate of perceived exertion(Through study completion, an average of 4 weeks)
- Mood states(Through study completion, an average of 4 weeks)
研究者
Alberto Pérez-López
Principal Investigator
University of Alcala