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Compatibility of Different Injury Prevention Exercises in Athletes

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ClinicalTrials.gov Identifier: NCT02311062
Recruitment Status : Completed
First Posted : December 8, 2014
Last Update Posted : December 8, 2014
Sponsor:
Information provided by (Responsible Party):
Fernando Naclerio, University of Greenwich

Brief Summary:

This investigation is aimed to examine the effects of two different exercise-oriented protocols on the knee torque-angle relationship of the knee flexors.

Thirty two young soccer players were be randomly assigned to three groups: hamstring-eccentric (ECC, n=11), unstable-squatting (UNS, n=11) or control (C, n=10). The ECC and UNS groups performed eighteen sessions over 6 weeks of an injury prevention protocol, using only 3 hamstring-eccentric or unstable-squatting exercises. The angle-torque relationship was measured before and after the training intervention. Voluntary isometric torque was recorded at six test angles, with participants prone (35º-100º; 0º on full extension).


Condition or disease Intervention/treatment Phase
Injury Prevention Other: Eccentric hamstring exercises Other: Unistable exercises Other: Control Not Applicable

Detailed Description:

This study utilized a three parallel-groups randomized controlled design, where 3 between-participant conditions, ECC, UNS and C, were tested. Once considered eligible for the study, all participants were familiarized with the testing procedures. Participants attended the laboratory for a pre-training test session, where body mass, height and muscle functional parameters were recorded. Two days after their pre-test, participants including in ECC or UNS started a 6 weeks (18 sessions) training program while the control group did not perform any type of resistance training.

Nevertheless, during the 6 weeks intervention period all three groups continued with their normal recreationally physical activity consisting in 2 to 3 sessions per week of soccer training or friendly matches. Two days after the end of the intervention period muscle function was re-tested.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 32 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Effects of Two Different Injury Prevention Resistance Exercise Protocols on the Hamstring Torque-Angle Relationship: A Randomized Controlled Trial
Study Start Date : March 2012
Actual Primary Completion Date : May 2012
Actual Study Completion Date : June 2012

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: Eccentric hamstring exercises
Three workouts per week on non-consecutive days for 6 weeks. 1)Assisted Nordic Curl: Kneeling on the ground with ankles fixed by a partner, participant lowering the trunk to the ground by eccentrically contracting the hamstrings. 2) Eccentric single stiff-legged dead lift: From standing position with the arm crossing over the chest, participant lowering the body toward the ground by flexing the hip joint without bending the support leg knee and raising the other leg until form an straight line with the trunk4 3) Eccentric double stiff-legged dead lift: From standing position with the arm crossing over the chest, participant lowering the body toward the ground by flexing the hip joint without bending the knees until the body parallel with the floor.
Other: Eccentric hamstring exercises
Three exercises: 3 sets of 8 repetitions with 1 minute of rest between sets and 2 minutes of rest between exercises

Experimental: Unistable exercises
Trained 3 times per week on non-consecutive days for 6 weeks for a total of 18 training sessions. UNS training consisted in the following three exercises: 1) One leg squat: Standing on the floor on one leg only and squat down until knee flexed to 900 and press back up with just that single leg. 2) One leg Squat on Bosu® balance Trainer: Standing on the Bosu® balance Trainer on one leg only and squat down until supported leg knee flexes to 900 and press back up with just that single leg. 3) Forward lunges on a Bosu® balance Trainer: position the forward leg on the Bosu® balance Trainer and squatting with the forward leg.
Other: Unistable exercises
Three exercises: 3 sets of 8 repetitions with 1 minute of rest between sets and 2 minutes of rest between exercises

Active Comparator: Control
Participants did not undergo any resistance training and continued with their regular soccer training.
Other: Control
Only soccer training




Primary Outcome Measures :
  1. knee torque-angle [ Time Frame: 1 week ]
    Isokinetic measurements



Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • males, recreationally trained football players
  • Read and sign the informed consent

Exclusion Criteria:

  • Participants that has undertaken a lower body resistance-training program in the preceding 6 months,
  • Reported a previous lower limb injury
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Responsible Party: Fernando Naclerio, Principal Lecturer, University of Greenwich
ClinicalTrials.gov Identifier: NCT02311062    
Other Study ID Numbers: UoG INJ001
First Posted: December 8, 2014    Key Record Dates
Last Update Posted: December 8, 2014
Last Verified: December 2014
Keywords provided by Fernando Naclerio, University of Greenwich:
training, soccer, eccentric, lengthening, unstable, squatting
Additional relevant MeSH terms:
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Wounds and Injuries