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.
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
61
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.
Universidad Católica San Antonio
Murcia, Spain
Linear hamstring flexibility
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
Time frame: Pre-test (week 1)
Linear hamstring flexibility
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
Time frame: Post-test (week 8)
Linear hamstring flexibility
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
Time frame: Re-test 1 (week 11)
Linear hamstring flexibility
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
Time frame: Re-test 2 (week 14)
Angular hamstring flexibility
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
Time frame: Pre-test (week 1)
Angular hamstring flexibility
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
Time frame: Post-test (week 8)
Angular hamstring flexibility
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
Time frame: Re-test 1 (week 11)
Angular hamstring flexibility
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
Time frame: Re-test 2 (week 14)
Thoracic spinal curvatures
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.
Time frame: Pre-test (week 1)
Thoracic spinal curvatures
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.
Time frame: Post-test (week 8)
Thoracic spinal curvatures
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.
Time frame: Re-test 1 (week 11)
Thoracic spinal curvatures
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.
Time frame: Re-test 2 (month 14)
Lumbar thoracic spinal curvatures
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.
Time frame: Pre-test (week 1)
Lumbar thoracic spinal curvatures
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.
Time frame: Post-test (Week 8)
Lumbar thoracic spinal curvatures
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.
Time frame: Re-test 1 (week 11)
Lumbar thoracic spinal curvatures
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.
Time frame: Re-test 2 (Week 14)
Pelvic Tilt
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.
Time frame: Pre-test (week 1)
Pelvic Tilt
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.
Time frame: Post-test (Week 8)
Pelvic Tilt
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.
Time frame: Re-test 1 (week 11)
Pelvic Tilt
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.
Time frame: Re-test 2 (Week 14)
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