The efficiency of training the craniocervical flexors using the Spinertial device and pressure biofeedback unit: a...

The aim of the present study was to compare longus capitis and longus colli (LC/C) and sternocleidomastoid (SCM) activity during a craniocervical flexion (CCF) exercise task performed using the Spinertial device versus the pressure biofeedback unit (PBU).

A prospective, observational, cross-sectional study was conducted with 40 volunteers. Participants were eligible if they were at least 18 years old, had no history of neck pain, and were able to correctly perform the CCF test up to the fourth or fifth stages (28-30 mmHg). Each participant performed a standardized CCF exercise task using both devices. The linear depth (thickness) of the LC/C was measured with ultrasound imaging, and the electrical activity of the SCM via surface electromyography. Range of motion and friction forces were standardized across conditions.

Forty participants (20 women and 20 men) were included in the study, with a mean age of 24.9 ± 3.4 years. The increase in LC/C thickness with the standardized CCF exercise task was significantly greater with Spinertial device than with the PBU (p = 0.015, d = 0.6). The SCM activity during the CCF exercise was significantly lower with the Spinertial device compared to the PBU (p < 0.001, d = 0.8).

Performing CCF with the Spinertial device facilities greater activation (thickness) of the LC/C with reduced SCM activity compared with the PBU. These findings support its potential clinical utility in targeted motor control training of the CCF.