Investigate the efficacy of the inercial Flywheel training protocol in modifying the architecture and function of the hamstrings in patients with a history of structural muscle injury vs conventional training. The researchers hypothesize that inercial Flywheel training protocol will be a useful strategy in the modification of the architecture and function of the hamstring in patients with a history of indirect structural muscle injury and decrease the recurrence.
Randomized controlled intervention study
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
24
To assess the effectiveness of the inertial flywheel resistance program in the architecture and function of the hamstrings post structural hamstring injury
Oulton GyMed, Rehabilitación y Gimnasio de Salud
Córdoba, Córdoba Province, Argentina
Change in the architecture and morphology of the hamstring
To assess change in architecture and morphology of the hamstring at 8 week. It will be performed by a medical specialist in diagnostic imaging with a A GE Voluson 730 Expert model ultrasound machine , with 6-12 MHz linear transducer. Panoramic images of the long portion of the biceps femoris and semitendinosus will be taken from its proximal insertion, In each muscle, muscle thickness, fascicle length, penetration angle and physiological cross-sectional area will be evaluated.
Time frame: 0 and 8 week
Change in Maximun isometric strength
To assess change in maximum isometric strength of hamstring in Newton (N). It will be measured in 3 repetitions with a hand dynamometer at two knee flexion angles.
Time frame: 0 and 8 week
Change in Rate of force development
To assess change in rate of force development of hamstring in N/seg at 8 week. it will be measured in 3 repetitions with a hand dynamometer at two knee flexion angles.
Time frame: 0 and 8 week
Change in Maximun eccentric strength
To assess the maximum eccentric strength of hamstring in Newton (N) from basiline. It will be measured in 3 repetitions with a hand held dynamometer.
Time frame: 0 and 8 week
Change in Oslo hamstring injury screening questionnaire
Self-administered questionnaire. The hamstring injury detection test will be carried out to assess the previous injury, symptoms, function and quality of life of these players with the "Oslo hamstring injury screening questionnaire" questionnaire.This tool is divided in 23 items within 5 categories: symptoms, discomfort, pain depending on daily activity, sports and quality of life for injuries in right or left hamstrings
Time frame: 0 and 8 week
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Functional scale of the lower limb
Self-reported patient-specific outcome measure assess functional change, primarily in patients presenting with musculoskeletal disorders. Patients are asked to identify up to 3 important activities they are unable to perform or are having difficulty with as a result of their problem. In addition to identifying the activities, patients are asked to rate, on an 11-point scale, the current level of difficulty associated with each activity. Following the intervention, patients are asked again to rate the activities previously identified. the lower limb will be used in its version validated in Argentina
Time frame: In the week before the 1st session of the protocol
Adverse events
To capture all adverse events and side effects that occurred after exercises protocol. Patients reported any changes or any symptoms. If a question was answered "yes", we asked for further comments To capture all adverse events and side effects that occurred after exercises protocol. Patients reported any changes or any symptoms. If a question was answered "yes", we asked for further comments
Time frame: week 8
Adherence self-report questionnaire
Patients were asked to choose one of six descriptions (from level 1 = perfect adherence to level 6 = nonadherence) to express exercise treatment at the end of the twelve weeks study period.
Time frame: week 8
Maximum Hip Flexion Active Knee Extension (MHFAKE) Test
to assess change in amplitude of movement of the hamstring in degrees with inclinometer
Time frame: 0 and 8 week
Single leg bridge test. Change in resistance of hamstring
to assess the ability or resistance of the hamstring in repetition numbers
Time frame: 0 and 8 week
Change in Test of a 1RM eccentric
To assess the maximun eccentric repetition in a conventional hamstring leg curl in kg
Time frame: 0 and 8 week