Immediate Pre-Post Effects of the Lightback Device on posterior chain Flexibility and Sciatic Nerve Stiffness in Healthy Adults.

One physiotherapist conducts one-on-one sessions with the patient, gradually increasing stretching until the patient reaches the maximum sensation without pain. Each stretching session lasts for 5 minutes Checklists were employed to assess patient interventions. Experimental Group: The LightBack® machine involves an anterior-posterior (A-P) mobilization of the femur, inducing a stretch of the posterior hip capsule and gluteal muscles. The subject will sit on the machine, bringing the knee towards the chest until it reaches 90º of hip flexion. When the subject feels a stretching sensation without pain, they will hold the position for 10 seconds. Subsequently, they will return to the initial relaxed position for 5 seconds and repeat the sequence 6 times for a total application time of one minute. It's a self-passive mobilization. The wash-out period between treatments will be 48 hours, which is considered sufficient to avoid carry-over effects in neuromuscular adaptations and perceived flexibility following a single stretching session. This interval is based on previous studies showing that the acute effects of stretching or posterior hip mobilization typically return to baseline within 24 to 48 hours. No stretching or physical therapy will be performed during this interval. Participants will be instructed to refrain from engaging in lower limb exercise or stretching during the wash-out period to ensure consistency.