Blood Flow Restriction Strength Training in Professional Soccer Players

Study Overview
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Brief Summary
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The aims of this clinical study are evaluated the effects of Blood Flood Restriction training on the sport performance of professional and semi-professional soccer players. The participants are twenty male professional and semi-professional soccer players who are playing at RCD Mallorca. Participants will be assigned in two different groups. Both groups develop for six weeks a strength training programs. The first group will base their training in Low Load using Blood Flow Restriction (20-50% of one maximum repetition). The second group will base their training in High Load (60-80% of one maximum repetition). This training program includes three type of exercises in each training session; back squat, single deadlift and barbell hip thrust. Before and after this program the investigators will collect sociodemographic and anthropometrics data. On top of that, the investigators will evaluate the muscle mass, the electrical activity produced by skeletal muscles, the muscle strength and the sprint ability of every participant. Before to the evaluation, the soccer players will warm-up during 15 minutes under the control of the evaluators.

Detailed Description
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PARTICIPANTS: Participants are soccer players of RCD Mallorca (Second Spanish Football Division) and RCD Mallorca B (Third Spanish Football Division).Before to start the study, every participant will receive an informed consent about the clinical study. This informed consent will be signed by them according to Declaration of Helsinki. At the same time, the data will be anonymized and only the main researcher of the study will have access to it, to ensure compliance with the Data Protection Law. W-UP: The warm-up will consist of 5 minutes running slow (treadmill), 5 minutes mobility, and 5 minutes of running exercises. In addition, the warm-up will contain a familiarization with the jump test

Official Title
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Effects of Blood Flow Restriction Resistance Training on Muscle Characteristics, Strength and Performance of Professional Soccer Players

Conditions
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Resistance Training, Blood Pressure

Intervention / Treatment
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* Other: Blood Flow Restriction Strength training with low load
* Other: High Load Strength Training


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: No injuries in the last 6 months 1 years experience minimun in the division. Exclusion Criteria: Amateurs players

Ages Eligible for Study
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Minimum Age: 14 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Strength training based on low loads with blood flow restriction (Experimental group I)<br>Squat Single Deadlift Back Squat | Other: Blood Flow Restriction Strength training with low load<br>* Low Load (20-50% 1RM), 4 set of 30/15/15/15 repetitions, 30 seconds resting between sets.<br>|
| Experimental: Strenght training based on high loads (Experimental group II)<br>Squat Single Deadlift Back Squat | Other: High Load Strength Training<br>* High Load (60-80% 1RM) 4 sets of 8 repetitions, 2 minutes resting between sets<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change from Baseline in Muscle Mass | Muscle Mass mesured with measuring tape | Change from Baseline in Muscle Mass at 6 Weeks | 
| Change from Baseline in Maximum Voluntary Isometric Contraction (MVIC) | MVIC mesured by Force Platform (Vald Performance, Brisbane, QLD) | Change from Baseline in Maximum voluntary Isometric Contraction at 6 Weeks | 
| Change from Baseline in Electrical Muscle Activity | Electrical Muscle Activity mesured by Surface Electromyography (mDurance®, España) | Change from Baseline in Electrical Muscle Activity at 6 weeks | 
| Change from Baseline in Countermovement Jump (CMJ) | CMJ Test measured by Force Platform (Vald Performance, Brisbane, QLD) | Change from Baseline in countermovement Jump (CMJ Test) at 6 weeks | 
| Change from in Force-Velocity Profile (F-V) | F-V Profile measured by MyJump App | Change from Baseline in Force-Velocity Profile at 6 Weeks | 
| Change from Baseline in Sprint Ability | Sprint Ability measured by MySprint App | Change from Baseline in Sprint Ability at 6 weeks | 
| Change from Post-Intervention in Sport Injuries Incidence | Incidence of injuries related to sport practice | Change from Post-Intervention up to 8 months. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Strenght Training, Soccer, Blood Flood Restriction, Performance, Sport Injuries