Effect of Postural Insoles on Stability and Leg Muscular Activity

Universidad de Extremadura

Status: Completed

Conditions: Postural Stability; Muscular Activity

Treatments: Diagnostic Test: Muscular assessment with a electromyograph; Diagnostic Test: Postural stability assessment with a force platform.

Study type: Interventional

Funder types: Other

Identifiers

NCT04836650

FOSSIL

Details and patient eligibility

About

Posturology allows to treat postural problems by using postural insoles, which will have an effect at the neurophysiological level. Pieces of 1 to 3 millimeters are inserted to stimulate specific receptors located on the sole of the foot, which will affect the muscular proprioception and modify the activation of the ascending muscle chains.

The hypothesis of this work is based on the fact that the use of postural insoles with a 2 millimeters metatarsal bar will influence the displacement of the center of pressure and the muscle activity of the leg when compared with a placebo insoles.

Participants will be healthy subjects and will be divided into two groups, control and experimental. Subjects in the control group will be given a pair of flat insoles (placebo insoles) with 1.2 millimeters polyester resin. Those of the experimental group will be made the same insoles but they will include by thermal fusion a metatarsal bar of 2 millimeters polyester resin in the metatarsal zone corresponding to the 1st, 2nd, 3rd and 4th metatarsal head.

Postural stability analysis will be performed with the force platform of the Biomechanics Institute of Valencia (IBV-Spain) and at the same time an electromyographic analysis in the dominant leg with a surface electromyograph system. Subjects will be assessed with their eyes open and closed under two situations, with footwear and with footwear and insoles.

Enrollment: 40 patients

Sex: All

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Healthy subjects with no discomfort in gait
• Subjects with not muscle and skeletal diseases

Exclusion criteria

• Subjects with balance disorders, pain at legs
• Subjects with loss of balance

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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40 participants in 2 patient groups, including a placebo group

Flat Insole (no metatarsal bar)

Placebo Comparator group

Description:

Postural stability and electromyographic activity in the dominant leg will be assessed with the subject shod (closed clog) and with 1.2 millimeters flat polyester resin insoles.

Treatment:

Diagnostic Test: Postural stability assessment with a force platform.

Diagnostic Test: Muscular assessment with a electromyograph

Flat Insole (with 2 millimeters metatarsal bar)

Experimental group

Description:

Postural stability and electromyographic activity in the dominant leg will be assessed with the subject shod (closed clog) and with 1.2 millimeters flat polyester resin insoles with a 2 millimeters polyester resin metatarsal bar.

Treatment:

Diagnostic Test: Postural stability assessment with a force platform.

Diagnostic Test: Muscular assessment with a electromyograph