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Completed

NCT Number: NCT05904834

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

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 dancers.

Participants will be dance student with ten years of experience that will undergo a program of stretching four times per week during seven weeks, followed by a detraining period, and a retraining period of three 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.

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Key information

Conditions

Spine Injury Animal Diseases Back Injuries Bone Diseases Deficiency Diseases Hamstring Injury Kyphosis Lumbar Hyperlordosis Malnutrition Musculoskeletal Diseases Nutrition Disorders Nutritional and Metabolic Diseases Sheep Diseases Spinal Curvatures Spinal Diseases Spinal Injuries Swayback Wounds and Injuries

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Universidad Católica San Antonio

Murcia, 30107, Spain

About this study

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.

The sample components (n=61) were divided into two groups following a random distribution carried out by an external researcher. The intervention group (IG), which consisted of 31 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. The control group (CG), composed of 30 dancers, did not perform the stretching programme. Both groups attended their practical classes in the conservatory. During the detraining period the dancers of both groups took a break from physical exercise.

The variables measured are hamstring extensibility and sagittal spine disposition and pelvic tilt.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

The inclusion criteria were:

  • students enrolled for at least 18 ECTS credits at the High Conservatory of Dance;
  • previous experience of 10 years in dance;
  • practice dance at least 4 days a week;

(c) not suffer from any chronic pathology or at the time of the study; (d) not practising any other physical exercise apart from dance.

Exclusion criteria

  • Not attending at least 80% of the practical sessions of the Conservatory throughout the programme;
  • being pregnant at the beginning of the study or getting pregnant during the development of the study;
  • having undergone surgery on the spine or hamstring musculature;
  • having suffered a hamstring injuries in the last year or during the study;
  • having structured spinal disorders;
  • having an injury at the time of the assessment that prevents her from taking the measurements;
  • stretching of the hamstring musculature outside the conservatory.

Treatment and study plan

Flexibility Training

Other

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.

Primary outcomes

  1. Linear hamstring flexibility

    Time frame: Pre-test (week 1)

    The flexibility of the hamstring will be assessed with different linear test. Sit and reach test will be performed and the measure will be reported in centimeters

  2. Linear hamstring flexibility

    Time frame: Post-test (week 8)

    The flexibility of the hamstring will be assessed with different linear test. Sit and reach test will be performed and the measure will be reported in centimeters

  3. Linear hamstring flexibility

    Time frame: Re-test 1 (week 11)

    The flexibility of the hamstring will be assessed with different linear test. Sit and reach test will be performed and the measure will be reported in centimeters

  4. Linear hamstring flexibility

    Time frame: Re-test 2 (week 14)

    The flexibility of the hamstring will be assessed with different linear test. Sit and reach test will be performed and the measure will be reported in centimeters

  5. Angular hamstring flexibility

    Time frame: Pre-test (week 1)

    The flexibility of the hamstring will be assessed with angular tests. Straight leg raise will be performed in the active and passive versions and the result will be reported in grades

  6. Angular hamstring flexibility

    Time frame: Post-test (week 8)

    The flexibility of the hamstring will be assessed with angular tests. Straight leg raise will be performed in the active and passive versions and the result will be reported in grades

  7. Angular hamstring flexibility

    Time frame: Re-test 1 (week 11)

    The flexibility of the hamstring will be assessed with angular tests. Straight leg raise will be performed in the active and passive versions and the result will be reported in grades

  8. Angular hamstring flexibility

    Time frame: Re-test 2 (week 14)

    The flexibility of the hamstring will be assessed with angular tests. Straight leg raise will be performed in the active and passive versions and the result will be reported in grades

  9. Thoracic spinal curvatures

    Time frame: Pre-test (week 1)

    The thoracic spinal curvatures will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  10. Thoracic spinal curvatures

    Time frame: Post-test (week 8)

    The thoracic spinal curvatures will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  11. Thoracic spinal curvatures

    Time frame: Re-test 1 (week 11)

    The thoracic spinal curvatures will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  12. Thoracic spinal curvatures

    Time frame: Re-test 2 (month 14)

    The thoracic spinal curvatures will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  13. Lumbar thoracic spinal curvatures

    Time frame: Pre-test (week 1)

    The lumbar spinal curvatures will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  14. Lumbar thoracic spinal curvatures

    Time frame: Post-test (Week 8)

    The lumbar spinal curvatures will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  15. Lumbar thoracic spinal curvatures

    Time frame: Re-test 1 (week 11)

    The lumbar spinal curvatures will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  16. Lumbar thoracic spinal curvatures

    Time frame: Re-test 2 (Week 14)

    The lumbar spinal curvatures will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  17. Pelvic Tilt

    Time frame: Pre-test (week 1)

    The pelvic tilt will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  18. Pelvic Tilt

    Time frame: Post-test (Week 8)

    The pelvic tilt will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  19. Pelvic Tilt

    Time frame: Re-test 1 (week 11)

    The pelvic tilt will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

  20. Pelvic Tilt

    Time frame: Re-test 2 (Week 14)

    The pelvic tilt will be assessed in different positions, including relaxed standing, the sit and reach test and Macrae & Wright test. The result will be reported in grades.

Sponsors and collaborators

Lead sponsor

Universidad Católica San Antonio de Murcia

Other

Registry information

Important dates

Study start
2023
Primary completion
2023
Study completion
2023
First posted
Jun 15, 2023
Registry last updated
Jun 6, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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