Effect of a Flexibility Program on the Extensibility of the Hamstrings and the Thoracic and Lumbar Spinal Curvatures

Sponsor

Universidad Católica San Antonio de Murcia (Other)

Overall Status

Completed

CT.gov ID

NCT05904834

Collaborator

(none)

Enrollment

Location

Arms

10.9

Actual Duration (Months)

5.5

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The goal of this clinical trial is to analyse the effect of an intervention program based on hamstring flexibility on the extensibility and curvatures of the spine in ballet dancers.

Participants will be dance student with ten years of experience that will undergo a program of stretching four times per week during ten weeks. There will be a pre-test, a post-test and two re-tests after the intervention.

The results will be compared with a control group of dancers that will not take part in the stretching program.

Condition or Disease	Intervention/Treatment	Phase
Spine Injury Hamstring Injury Lumbar Hyperlordosis Kyphosis	Other: Flexibility training	N/A

Detailed Description

Four measurements were carried out, one before the intervention (pre-test), one after the first stretching programme (post-test), one after a short period of detraining (re-test 1) and the last one at the end of a second period of intervention (re-test 2), analysing the intra-group and inter-group differences for each of the dependent variables of the 10-week hamstring stretching programme.

The sample components (n=57) were divided into two groups following a random distribution carried out by an external researcher. The intervention group (IG), which consisted of 30 dancers, underwent the hamstring stretching programme for a first period of 7 weeks and a second period of 3 weeks after a short period of detraining. The intervention consisted of static and dynamic stretching of the hamstring muscles 4 days per week. Each session consisted of three or four exercises, of which three were static stretches and if there was a fourth, it was dynamic. The duration of each exercise was 20 seconds with 15 seconds rest between sets and 30 seconds rest between exercises. The control group (CG), composed of 27 dancers, did not perform the stretching programme. Both groups attended their practical classes 4 days a week, with a duration of two hours per day. The classes consisted of specific training in each of the dance styles taught at the School of Dance. During the detraining period the dancers of both groups took a break from physical exercise.

Prior to the start of the intervention programme, anthropometric variables and assessments of hamstring extensibility and sagittal arrangement of the thoracic and lumbar spine and pelvic tilt were carried out before, during and after the intervention programme.

Study Design

Study Type:

Interventional

Actual Enrollment :

60 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Intervention Model Description:

Single intervention group and single control groupSingle intervention group and single control group

Masking:

Single (Investigator)

Masking Description:

The investigators on charge of the test do not know the group they are measuring

Primary Purpose:

Prevention

Official Title:

Effect of a Flexibility Program on the Extensibility of the Hamstrings and the Thoracic and Lumbar Spinal Curvatures

Actual Study Start Date :

Sep 1, 2014

Actual Primary Completion Date :

Jul 30, 2015

Actual Study Completion Date :

Jul 30, 2015

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Flexibility training The intervention group Will undergo a flexibility training focused on hamstring extensibility during a period of ten weeks. Each will they will take part in four stretching sessions besides the normal training.	Other: Flexibility training Each session consisted of three or four exercises, of which three were static stretches and if there was a fourth, it was dynamic. The duration of each exercise was 20 seconds with 15 seconds rest between sets and 30 seconds rest between exercises.
No Intervention: No training The control group will continue with their training routine during the experiment.

Arm

Intervention/Treatment

Experimental: Flexibility training

The intervention group Will undergo a flexibility training focused on hamstring extensibility during a period of ten weeks. Each will they will take part in four stretching sessions besides the normal training.

Other: Flexibility training

Each session consisted of three or four exercises, of which three were static stretches and if there was a fourth, it was dynamic. The duration of each exercise was 20 seconds with 15 seconds rest between sets and 30 seconds rest between exercises.

No Intervention: No training

The control group will continue with their training routine during the experiment.

Outcome Measures

Primary Outcome Measures

Linear hamstring flexibility [Pre-test (month 1)]
The flexibility of the hamstring will be assessed with different linear test. Sit and reach and toe touch test will be performed and the measure will be reported in centimeters
Linear hamstring flexibility [Post-test (month 8)]
The flexibility of the hamstring will be assessed with different linear test. Sit and reach and toe touch test will be performed and the measure will be reported in centimeters
Linear hamstring flexibility [Re-test 1 (month 9)]
The flexibility of the hamstring will be assessed with different linear test. Sit and reach and toe touch test will be performed and the measure will be reported in centimeters
Linear hamstring flexibility [Re-test 2 (month 10)]
The flexibility of the hamstring will be assessed with different linear test. Sit and reach and toe touch test will be performed and the measure will be reported in centimeters
Angular hamstring flexibility [Pre-test (month 1)]
The flexibility of the hamstring will be assessed with angular tests. Straight lerg aise will be performed in the active and passive versions and the result will be reported in grades
Angular hamstring flexibility [Post-test (month 8)]
The flexibility of the hamstring will be assessed with angular tests. Straight lerg aise will be performed in the active and passive versions and the result will be reported in grades
Angular hamstring flexibility [Re-test 1 (month 9)]
The flexibility of the hamstring will be assessed with angular tests. Straight lerg aise will be performed in the active and passive versions and the result will be reported in grades
Angular hamstring flexibility [Re-test 2 (month 10)]
The flexibility of the hamstring will be assessed with angular tests. Straight lerg aise will be performed in the active and passive versions and the result will be reported in grades
Cervical spinal curvatures [Pre-test (month 1)]
The cervical spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Cervical spinal curvatures [Post-test (month 8)]
The cervical spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Cervical spinal curvatures [Re-test 1 (month 9)]
The cervical spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Cervical spinal curvatures [Re-test 2 (month 10)]
The cervical spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Thoracic spinal curvatures [Pre-test (month 1)]
The thoracic spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Thoracic spinal curvatures [Post-test (month 8)]
The thoracic spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Thoracic spinal curvatures [Re-test 1 (month 9)]
The thoracic spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Thoracic spinal curvatures [Re-test 2 (month 10)]
The thoracic spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Lumbar thoracic spinal curvatures [Pre-test (month 1)]
The lumbar spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Lumbar thoracic spinal curvatures [Post-test (month 8)]
The lumbar spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Lumbar thoracic spinal curvatures [Re-test 1 (month 9)]
The lumbar spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades
Lumbar thoracic spinal curvatures [Re-test 2 (month 10)]
The lumbar spinal curvatures will be assessed in different positions, including standing, forced rectification, sitting, during the sit and reach test and during Macrae & Wright test. The result will be reported in grades

Eligibility Criteria

Criteria

Ages Eligible for Study:

N/A and Older

Sexes Eligible for Study:

Female

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

female students enrolled for at least 18 credits at the School of Dance during the 2014-2015 academic year
previous experience of 10 years in one of the styles taught at the School of Dance, minimum 4 days a week.
no physical exercise other than dance

Exclusion Criteria:

Failure to attend at least 80% of the practical sessions throughout the programme.
undergoing physiological changes during the intervention due to pregnancy or eating disorders
having undergone surgery on the spine or on the hamstring muscles
To have a ruptured hamstring muscle within the last year or during the operation; or have structured spinal disorders or an injury at the time of the assessment that prevents him/her from taking measurements
Perform stretching of the hamstring muscles moments before the measurements and/or during the detraining period.