Correlation between scapular dyskinesia and grip strength in auto rickshaw driver

Background: An auto rickshaw drivers tends to work for longer duration, shoulder muscles are always active as well as unsupported while driving and kept in fixed position for considerably longer duration, which leads to shoulder pain. The structure of auto rickshaw includes handle bar control causing continuous gripping activity and repetitive movements of wrists leading to wrist/hand pain. Scapular dyskinesia is an alteration in the normal position or motion of scapula during coupled Scapulo-humeral movement. Grip strength is a measure of muscular strength or maximum force/tension generated by one’s forearm muscle
Objective: To correlate between scapular dyskinesia and grip strength in auto rickshaw drivers.
Method: Scapular dyskinesia was assessed using Kibbler’s classification and scapular slide test and grip strength using Jammar hand-held dynamometer.
Result:Pearson coefficient of correlation was used to correlate between scapular distance and grip strength which shows negative correlation for dominant side for hand at side (r)=-0.4704, 45 degree (r)= -0.4817 and 90 degree (r) = -0.5329.Pearson coefficient of correlation was used to correlate between scapular distance and grip strength which shows negative correlation for dominant side for hand at side (r)= -0.5750, 45 degree (r)= -0.6118 and 90 degree (r) = -0.6670.scapular dyskinesia increases with scapular distance there is a positive correlation between scapular dyskinesia and grip strength.Unpaired t test was used to find out the difference between the grip strength of dominant and non-dominant side (p=0.0110) which is significant that suggest the dominant side has more grip strength compared to non-dominant side.
Conclusion: This study concludes that there is a significant correlation between scapular dyskinesia and grip strength which is more significant in the non-dominant side. So as per the study we can conclude that scapular dyskinesia does affect the grip strength.