Acute Effects of Neurodynamic Stretching on Muscle-tendon Complex FReSH-61023-en Lesya BAUDOIN Acute Effects of Neurodynamic Stretching on Muscle-tendon Complex ELASTRETCH FReSH-61023-en NCT07304765 CEP2204 Andréa BLIVET UNIVERSITE BOURGOGNE EUROPE France Recherche en Santé Humaine (FReSH) GIS-INSTITUT POUR LA RECHERCHE EN SANTE PUBLIQUE (IRESP) null Andréa;BLIVET CPP Emergency medicine Physical and Rehabilitation Medicine Sports medicine Biological determinants Biological determinants: Other physical condition Neurodynamic mobilization techniques are widely applied in rehabilitation and physiotherapy to enhance the mobility and function of peripheral nerves. Two main approaches are distinguished. Nerve tensioning and nerve flossing. They both involve proximal and distal joint movements to induce greater neural sliding while avoiding excessive tensile stress. However, contradictory findings on neurodynamic techniques highlighted the current lack of consensus regarding these techniques. Moreover, neurodynamic techniques are of interest for patients, it appeared it could also be applied in healthy individuals and more particularly in athletes. Accordingly, the primary objective of the present study was to determine the immediate effect of two neurodynamic mobilization techniques (flossing vs. tensioning) on the sciatic nerve and hamstring tissues using the shear wave elastography (SWE, a form of ultrasonography). Neurodynamic mobilization techniques are frequently applied in rehabilitation settings to enhance the mobility and function of peripheral nerves, particularly in the management of neuropathic pain such as carpal tunnel syndrome, radiculopathies, or sciatica. Two main approaches are distinguished. Nerve tensioning involves maintaining the nerve stretched at the end of the joint range of motion with relatively limited excursion. It is similar to a static stretching intervention but with distal (ankle) and proximal (cervical) tensions. Nerve flossing (also termed gliding or sliders), consists of alternating proximal and distal joint movements to induce greater neural sliding while avoiding excessive tensile stress. However, contradictory findings on neurodynamic techniques highlighted the current lack of consensus regarding the acute effects of the different possible neurodynamic techniques on sciatic nerves, particularly in healthy tissues. Moreover, neurodynamic techniques are of interest for patients, it appeared it could also be applied in healthy individuals and more particularly in athletes. Performed in patients, healthy or athletes, no study has compared both tensioning or flossing techniques. Moreover, because these techniques involved nerve mobilisation, the intensity should have a main effect of its efficiency. Accordingly, the primary objective of the present study was to determine the immediate effect of two neurodynamic mobilization techniques (flossing vs. tensioning) on the sciatic nerve and hamstring tissues using the shear wave elastography (SWE). This method has been shown reliable to provide non-invasive real-time assessments of soft tissues elastic properties. The secondary aim was to determine the effects of stretching intensity (at the point of pain threshold or below). France Individus General population Female Male Other Young Adult (19 to 24 years) Adult (25 to 44 years) Middle Aged (45 to 64 years) Aged (65 to 79 years) healthy physical active no injuries (lower limb or back pain) in the past 3 months Specific lower limb (hamstring) injuries in the past 2 years Not restraining activity 24h before participation Clinical data Paraclinical data (non-biological) Paraclinical data (non-biological) : Imaging Paraclinical data (non-biological) : Function testing Faculty scientific council Nerve shear wave velocity using elastography Muscle shear wave velocity using elastography Hamstring force Biceps femoris activity passive knee extension Global flexibility once Non-probability Other < 500 individuals Experiment / trial Laboratory experimentation (controlled conditions) Interventional Study Interventional Study Monitoring by participant visit to the investigation center 21 Completed study website Open access Andréa;BLIVET data freely available in online websites