Smartphone Addiction and Cervical Muscular Health

"Participants in both groups undergo a one-time diagnostic evaluation consisting of:~Smartphone Addiction Scale - Short Form (SAS-SF)~Neck Disability Index (NDI)~MyotonPRO measurement of cervical muscle tone, stiffness, and elasticity~Pressure pain threshold measurement using a handheld algometer~Social Media Addiction Scale (SMAS)~No therapeutic or behavioral intervention is applied. All procedures are non-invasive and conducted for observational purposes only."