Bulgarian Squat in the Improvement of Asymmetries of Lower Limbs in Soccer Players

NCT ID: NCT04285593

Last Updated: 2021-09-05

Basic Information

• Recruitment Status: WITHDRAWN
• Clinical Phase: NA
• Study Classification: INTERVENTIONAL
• Study Start Date: 2020-03-02
• Study Completion Date: 2020-06-10

Brief Summary

1541/5000 The aim of the Bulgarian squat is to improve the hamstring strength and the stability of the knees, thus reducing asymmetries in the lower limbs. It consists in achieving greater strength and stability of the lower limbs to adapt the athlete to the demands of training and competitions as safely as possible.

The main objective of the study is to assess the effectiveness of the Bulgarian squat, in the improvement of asymmetries in lower limbs; improving hamstring strength and knee stability.

Randomized, simple blind clinical study. 30 soccer players will be randomized to the study groups: experimental (Bulgarian squats) and control (non-intervention team routine). The treatment will last 4 weeks, with 2 weekly sessions of 10 minutes each. The study variables will be: lower limb strength (vertical jump with the My Jump 2 application), lower limb stability (Y ™ -Balance test) and lower limb asymmetries (Triple Hop Test, Single Hop Test for Distance and Functional Movement Screen) The normality of the sample will be calculated using the Kolmogorov -Smirnof test. The changes after each evaluation will be analyzed with the t-student test and with an ANOVA of repeated measures, the intra and intersubject effect will be observed. The effect size will be calculated using Cohen's formula.

An improvement in the strength, stability and asymmetries of the lower limbs in soccer players is expected.

Conditions

Football Players

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: SINGLE

Study Groups

Experimental group

Each session will last 10 minutes, taking place two days a week, over a period of four weeks. The intervention will take place at the beginning of the training session.

The players included in the experimental group will perform an exercise protocol with Bulgarian squats.

Group Type: EXPERIMENTAL

Bulgarian squats

Intervention Type: OTHER

The intervention using Bulgarian squat exercises will consist in the application of the protocol described by Aguilera-Castells et al. The technique will be done with the footballer standing. The athlete with one foot in front and the other behind the body, arms crossed over her chest, and her upper body, will remain upright with a natural swing in the lower back during the entire exercise. The players will lower the body (eccentric phase) until the front knee flexes to 90º. Subsequently, they will return to the initial position with a full extension of the knee of the front leg (concentric phase), maintaining an erect trunk position. The front foot will be placed in a fixed position contacting the ground, and the rear foot will rest on a horizontal press bench.

Control group

The players included in the control group will continue with their usual warm-up routine.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

Bulgarian squats

The intervention using Bulgarian squat exercises will consist in the application of the protocol described by Aguilera-Castells et al. The technique will be done with the footballer standing. The athlete with one foot in front and the other behind the body, arms crossed over her chest, and her upper body, will remain upright with a natural swing in the lower back during the entire exercise. The players will lower the body (eccentric phase) until the front knee flexes to 90º. Subsequently, they will return to the initial position with a full extension of the knee of the front leg (concentric phase), maintaining an erect trunk position. The front foot will be placed in a fixed position contacting the ground, and the rear foot will rest on a horizontal press bench.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Female players
• With an age range of 18 to 35 years
• Federated in the Community of Madrid
• That at the time of the study do not suffer any injury

Exclusion Criteria

• Athletes who have not undergone surgery on the lower limbs in the last three months
• Who have not taken muscle relaxants in the last three days
• Who have not understood or have a lack of understanding about the intervention
• Have not signed the informed consent document

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 35 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: Yes

Sponsors

Investigación en Hemofilia y Fisioterapia

NETWORK

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Universidad Europea de Madrid

Madrid, Comunity of Madrid, Spain

Countries

Spain

Other Identifiers

AJF

Identifier Type: -

Identifier Source: org_study_id