Effect of Smartphone Addiction on Cervical Posture, Hand Grip Strength and Respiratory Function among Secondary school students of Delhi.

It is an observational cross-sectional study. The aim of the study is to check the effect of smartphone addiction on cervical posture, handgrip strength and respiratory function among secondary school students of Delhi. A total of 246 students each will be taken by random method samplingon the basis of the inclusion and exclusion criterion. Procedure includes secondary school students having Smartphone Addiction (defined by SAS-SV Questionnaire) and Body mass index (BMI) in the normal range (18.5 to 24.9 kg/m2), measurement of  Craniovertebral angle(CVA) using ON PROTRACTOR app, hand grip strength through Jamar grip dynamometer, Respiratory function testing using ClaritySpiro Tech CMPS – 01. Primary outcome includes Craniovertebral angle (CVA), Hand grip strength and Respiratory function (FEV1, FVC,  FEV1/FVC, FEF25-75%,  MVV,  Breathinginspiration hold time,  Breathinginspiration hold time). Statisticalanalyses will be performed by using SPSS software. (Version 28.0.1.1). Mean ± SD will becalculated for the quantitative variables and frequency along with thepercentage will be calculated for categorical data. Appropriate statisticalanalysis will be done after collecting data.