The Effect of Cryotherapy on Recovery and Performance: A Randomized Controlled Double Blind Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 22
- 试验地点
- 2
- 主要终点
- Delayed-onset Muscle Soreness (DOMS)
研究概览
简要总结
This study investigates the effects of cooling on the recovery and performance characteristic in young healthy subjects. The study is divided in two projects:
Project A: investigates the effects of 20 min. post-exercise cooling on vertical jump performance and delayed onset muscle soreness and rated perceived exertion.
Project B: investigates the effects of 20 min. pre-exercise cooling on maximal voluntary contraction of the right M. quadriceps femoris and delayed onset muscle soreness and rated perceived exertion.
详细描述
The aim of this study is to investigate the effects of a 20 min. external cooling application (+8°C ) versus a external thermo neutral application (+32°C) up to 72 hours post application.
The study is divided in two projects:
Project A: This study is focusing on the recovery process after a max. jump performance (3x30 counter movement jumps). Directly after the exercise subjects receive a cooling or thermo-neutral application. Recovery characteristics measured by vertical jump performance (objective) and delayed onset muscle soreness and rated perceived exertion (subjective) are measured in function of time up to 72 hours post cooling intervention.
Project B: This study is focusing on the effect of 20 min. cooling or thermo-neutral application on the M. quadriceps femoris performance (MVC). After the thermo-application, the 60% endurance MVC is measured by means of surface EMG (OT Bioelettronica 10-750 Hz) in a ergometer chair 90° degrees knee flexion (Cor 1 Bioelettronica). Muscle conduction velocity, MVC (objective), delayed onset muscle soreness and rated perceived exertion (subjective) are measured in function of time up to 72 hours post thermo-application.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 30 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •only healthy young subjects 18-30 years
- •no musculoskeletal surgery in trunk and lower extremities
- •injury history in trunk and lower extremity for more than one year
- •subjects taking anticonceptive medication are allowed to participate
排除标准
- •actual injuries or injuries for less than one year in trunk and /or lower extremities
- •injury history in trunk and lower extremity for more than one year with complaints
- •anxiety of cooling
- •subjects on medication
- •pace maker
- •cardiovascular disease
- •pregnancy
- •skeletal problems
- •appendectomy for less than two years
- •Morbus Raynaud syndrome
研究组 & 干预措施
cooling intervention
subjects in this study receive a single pre-exercise (3x MVC) or post-exercise intervention (3x 30 counter movement jumps), consisting of an external cooling application (Zamar Therapy CT clinic) applied to both thighs. Both interventions have a duration of 20 minutes and a temperature of 8°C
干预措施: Zamar Therapy CT clinic (Device)
thermoneutral intervention
subjects in the control group receive a single pre-exercise (3x MVC) or post-exercise (3x 30 counter movement jumps) sham intervention, consisting of a 20 minute external thermoneutral application (Zamar Therapy CT clinic) applied to both thighs. Both sham interventions have a duration of 20 minutes and a temperature of 32°C.
干预措施: Zamar Therapy CT clinic (Device)
结局指标
主要结局
Delayed-onset Muscle Soreness (DOMS)
时间窗: 72 hours
The subjective recovery characteristics "Delayed-onset muscle soreness (DOMS)" was rated on a 0-10 cm visual analog scale. DOMS was assessed in a squat position (90° knee angle, with brief holding of maximum 3 seconds) ranging from zero (no soreness) to ten (severe soreness). Higher values mean mean more DOMS and therefore less recovery.
Ratings of Perceived Exertion (RPE)
时间窗: 72 hours
The subjective recovery characteristics " Ratings of perceived exertion (RPE)" was rated on a 6-20 Borg scale (from 6 = "no exertion at all" to 20 = "Maximal exertion") in a standing position. The higher value means more exertion and therefore less recovery.
Vertical Jump Performance (VJP)
时间窗: 72 hours
Vertical jump performance (VJP) was assessed performing three maximal counter mouvemet jumps (CMJs) with a 30-second pause between the three jumps on the Just Jump system (Probotics Inc, Huntsville, AL, USA). The highest jump was recorded.
Peak Power Output (PPO)
时间窗: 72 hours
Peak power output (PPO) was assessed performing three maximal counter movement jumps (CMJs) on the Just Jump system (Probotics Inc, Huntsville, AL, USA) with a 30-second pause between the three jumps. PPO (presented in watts) was calculated.
次要结局
未报告次要终点