Influence of Cooling on the Effect of Strength Training

Study Overview
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Brief Summary
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The aim of this study is to investigate if regular cold water immersion after strength training has a negative influence on the desired training-induced performance enhancement.

Detailed Description
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Recovery strategies represent a not sufficiently investigated chance in elite training control to optimize the complete training process. Coaches and athletes are confronted with numerous potentially effective recovery methods, e.g. cooling, warming, active recovery, compression, massage or power naps. However, the effectivity of these methods has rarely been investigated under controlled scientific conditions. Based on the state of the art,so far hardly any definite practical conclusions regarding effective recovery methods can be drawn, especially regarding sport-specific strategies and settings. Currently, cold water immersion is a particularly popular recovery strategy. However, there are hints that repeated cooling interventions after training can impair the training effect. This could potentially be caused by a faster reconstitution of homeostasis due to cooling. For fast recovery of performance, this effect would be desirable, but at the same time these homeostatic disturbances are the basis of signal processes leading to training adaptations. The aim of this study is to investigate if regular cold water immersion after strength training has a negative influence on the desired training-induced performance enhancement.

Official Title
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Influence of Cooling on the Effect of Strength Training

Conditions
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Strength Training Effects

Intervention / Treatment
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* Other: cold water immersion


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: healthy, 18-40 years, strength training experience, 8 weeks no leg strength training Exclusion Criteria: -

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: cooling<br>strength training and cold water immersion | Other: cold water immersion<br>* 10 min at 12-15°C<br>|
| No Intervention: control<br>strength training and no cold water immersion | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 1 Repetition Maximum | Maximum weight in kg that can be successfully moved in a leg press | 8 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Counter Movement Jump | Maximum jump height in cm in a counter movement jump, measured with a force plate | 8 weeks | 
| blood parameters | CRP, CK, IL-6, IGF-1 | 8 weeks | 
| muscle biopsy | p70S6, PAX7+, NCAM+ | 8 weeks | 
| muscle thickness | upper leg circumference in cm | 8 weeks | 
| subjective restfulness of sleep | 5-point Likert scale on subjective restfulness of sleep (1: very, 5: not at all) | 2 weeks | 
| time in bed | Questionnaire recording time of going to bed (time in hh:mm), sleep onset latency (duration in min), waking time (time in hh:mm), and time of getting up (time in hh:mm). From these items, the average time in bed per day is calculated, starting at time of going to bed and ending at time of getting up. | 2 weeks | 
| sleeping time | Questionnaire recording time of going to bed (time in hh:mm), sleep onset latency (duration in min), waking time (time in hh:mm), and time of getting up (time in hh:mm). From these items, the average sleeping time per day is calculated, starting at time of going to bed + sleep onset latency and ending at waking time. | 2 weeks | 
| questionnaire on recovery and stress | Short Recovery and Stress Scale for Sport (SRSS): assessing recovery (physical performance capability, mental performance capability, emotional balance, overall recovery) and stress (muscular stress, lack of activation, negative emotional state, overall stress), each item is rated on a 7-point rating scale (0: does not apply at all, 6: fully applies). For evaluation, two outcome values (recovery and stress) are calculated as the sum of the corresponding subvalues, i.e. each outcome value is on a 25-point scale (0: does not apply at all, 24: fully applies). | 2 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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cold water immersion, strength training, training effect