A Comparison of Frequency Domain of the Selected Trunk and Neck Muscles in Male Children with Forward Head and Healthy Control Ones during Running

The aim of this study was to compare the frequency domain of selected trunk and neck muscles in children with forward head posture and healthy control ones during running.
Subjects and twelve available male children with forward head (age: 11.7±1.4 years, height: 149.7±6.2 cm, weight: 38.0±4.7 kg) and 16 healthy male children (age: 11.8±1.3 years, height: 148.7±6.3 cm, weight: 39.6±5.4 kg) volunteered to participate in this study. The electrical activity of the selected muscles on the both sides of the body were recorded during running.
The frequency amplitude of right serratus anterior muscle in forward head group was higher than the healthy group by 17.6% during stance phase of running. The lower trapezius muscle asymmetry index in the forward head group was higher than that in the healthy group by 105%. Upper trapezius muscle asymmetry index in the forward head group was higher than that in the healthy group by 141% during swing phase of running (P=0.005).
Higher frequency content of the right stratus anterior muscle in the forward head group during stance phase of running may be due to weakness of this muscle. Because of the higher asymmetry index in the lower and upper trapezius muscle asymmetry indices during stance and swing phases of running in children with forward head posture compared to healthy ones, it is necessary to design a training protocol for improving the strength symmetry in these muscles in these children.