Healthy Volunteers
Conditions
Brief summary
The proprioceptive system and strength are closely related within the sensorimotor system: proprioception enables effective and coordinated muscle activation (including intramuscular and intermuscular coordination or synergistic abilities), which is essential for maintaining the functional stability of joints and preventing injuries-in short, for controlling motor patterns. This principle provides a window through which changes in strength can be observed via peripheral proprioceptive stimulation that activates the muscular system with the goal of increasing recruitment. This justifies the implementation of proprioceptive input in approaches aimed at motor learning.
Detailed description
Objective: To determine whether the application of a peripheral proprioceptive stimulus to the neuromuscular motor points of the quadriceps increases strength and neuromuscular activation during the squat movement in the lower limbs of healthy, untrained subjects. Methods: The design of this study is a randomized crossover clinical trial. All participants (n=36) will randomly receive both the Active and Sham proprioceptive stimulation.The proprioceptive stimulus will consist of intermittent mechanical pressure on the skin, localized at the neuromuscular motor points of the rectus femoris, vastus lateralis, and vastus medialis of the quadriceps. The tissue subjected to precise pressure in these highly innervated neuromuscular zones promotes the stimulation of kinesthetic cortical sensitivity. The outcome variable will be the assessment of Maximum Strength (MS) generated by the participant during the squat movement, from a 90º knee flexion position to full extension. At the moment of peak force, the mean velocity (MV) of the concentric phase of the movement and the maximum load the participant can move will be evaluated. The intervention, assessment, and recruitment will take place at the Faculty of Health Sciences, Blanquerna - Ramon Llull University
Interventions
The proprioceptive stimulus will consist of intermittent mechanical pressure on the skin, localized at the neuromuscular motor points of the rectus femoris, vastus lateralis, and vastus medialis of the quadriceps. The tissue subjected to this precise pressure in areas of high neuromuscular innervation facilitates the stimulation of kinesthetic cortical sensitivity. The experimental group (EG) will be randomly and crosswise subdivided into two groups, so that both receive the intervention in two different modalities at two different times.
Sponsors
Facultat de ciencies de la Salut Universitat Ramon Llull
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Intervention model description
The design of this study is a randomized crossover clinical trial. All participants (n=36) will randomly receive both the Active and Sham proprioceptive stimulation.
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
Yes
Inclusion criteria
: * State of health with no history of neuromuscular injuries * Without surgical interventions, or lower limb trauma in the last six months * No associated cardiovascular disease * No associated severe COPD. * AllParticipants are considered untrained if they do not engage in any specific vigorous lower-limb strength training or regularly perform physical exercise or sports activities.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Maximum Strength (MS) | estimated time of movement and data collection of 20 minutes | The outcome variable will consist of the assessment of Maximum Strength (MS) generated by the participant during the squat movement, from a 90º knee flexion position to full extension measured in two units, kilograms and newtons. |
Other
| Measure | Time frame | Description |
|---|---|---|
| electric neuromuscular activation | estimated time of movement and data collection of 20 minutes | In addition to strength assessment, portable sensors will be placed to digitize kinematics (knee and foot joint angles) and muscle electrical activity (surface electromyography), related to the variable of neuromuscular activation during the squat movement. |
Countries
Spain
Contacts
Primary ContactPedro V López Plaza
Outcome results
None listed