Compatibility of Different Injury Prevention Exercises in Athletes

NCT02311062 | Completed DMC

• 1 other identifier: UoG INJ001
• Study Type: interventional
• Target: 32
• Locations: 0 countries
• Sites: N/A

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).

Conditions

Injury Prevention

Keywords

training, soccer, eccentric, lengthening, unstable, squatting

Outcome Measures

Primary Outcomes (1)

• knee torque-angle

  Isokinetic measurements

  1 week

Study Arms (3)

Eccentric hamstring exercises

EXPERIMENTAL

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

Unistable exercises

EXPERIMENTAL

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

Control

ACTIVE COMPARATOR

Participants did not undergo any resistance training and continued with their regular soccer training.

Other: Control

Interventions

Eccentric hamstring exercises OTHER

Three exercises: 3 sets of 8 repetitions with 1 minute of rest between sets and 2 minutes of rest between exercises

Eccentric hamstring exercises

Unistable exercises OTHER

Three exercises: 3 sets of 8 repetitions with 1 minute of rest between sets and 2 minutes of rest between exercises

Unistable exercises

Control OTHER

Only soccer training

Control

Eligibility Criteria

• Age: 18 Years - 45 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

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

You may not qualify if:

• Participants that has undertaken a lower body resistance-training program in the preceding 6 months,
• Reported a previous lower limb injury

Sponsors & Collaborators

• University of Greenwich: lead

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Professor

Study Record Dates

• First Submitted: December 2, 2014
• First Posted: December 8, 2014
• Study Start: March 1, 2012
• Primary Completion: May 1, 2012
• Study Completion: June 1, 2012
• Last Updated: December 5, 2023

Record last verified: 2023-11