Other: Vojta The subject will be placed on a stretcher with the torso uncovered. Once the adhesive electrodes have been placed in the different recording areas on the anterior part of the trunk, a recording of the activity at rest will begin, two minutes of stimulation (digital pressure), one minute of rest, two minutes of stimulation in the contralateral side and, finally, one minute of rest.

The therapy consists of the application of a stimulating pressure in the pectoral area in the pattern of the locomotion complex of reflex rolling in its first phase. For this, the subject will be placed in a supine position aligned with respect to the axial axis, with the arms along the body, the lower extremities in extension, and the head extended with a rotation of approximately 30º towards one side of the stimulation. The manual stimulation pressure will be exerted in the space between the 6th-7th or the 7th-8th rib under the mammillary line, with a force of about 2 kg.

Other: Vojta The subject will be placed on a stretcher with the torso uncovered. Once the adhesive electrodes have been placed in the different recording areas on the anterior part of the trunk, a recording of the activity at rest will begin, two minutes of stimulation (digital pressure), one minute of rest, two minutes of stimulation in the contralateral side and, finally, one minute of rest.

The therapy consists of the application of a stimulating pressure in the pectoral area in the pattern of the locomotion complex of reflex rolling in its first phase. For this, the subject will be placed in a supine position aligned with respect to the axial axis, with the arms along the body, the lower extremities in extension, and the head extended with a rotation of approximately 30º towards one side of the stimulation. The manual stimulation pressure will be exerted in the space between the 6th-7th or the 7th-8th rib under the mammillary line, with a force of about 2 kg.

The therapy consists of the application of a stimulating pressure in the pectoral area in the pattern of the locomotion complex of reflex rolling in its first phase. For this, the subject will be placed in a supine position aligned with respect to the axial axis, with the arms along the body, the lower extremities in extension, and the head extended with a rotation of approximately 30º towards one side of the stimulation. The manual stimulation pressure will be exerted in the space between the 6th-7th or the 7th-8th rib under the mammillary line, with a force of about 2 kg.

The electromyographic activity of internal and external obliques in nanovolts will be collected before, during and after the intervention. Acquired signals are sampled at 1 KHz and filtered with a 60 Hz high pass digital filter to reject signals of non-muscular origin. The degree of muscle activation measured in micro volts (uV) will be recorded.

It will be registered at the beginning of the study in order to calculate the age of the participant.

It will be registered at the beginning of the study.