Effect of Two Passive Stretch Manoeuvres for 4 Weeks on Pectoralis Minor Length and Scapular Kinematics among Collegiate Swimmer (original) (raw)

Journal of Yoga and Physiotherapy

Purpose of the study: Purpose of this study was to compare the acute effects of two passive stretch maneuvers aimed at lengthening the pectoralis minor and the subsequent effects on scapular kinematics among a group of collegiate swimmers. Study design: Experimental study. Methodology: A convenience sample of 30 swimmers subject divided into two group, Group B and Group A who fulfilled the inclusion criteria were included in the study. Testing occurred during a single session at the participating team's swimming facilities or within abiomechanics using a pre-test post-test design. Each shoulder was randomly assigned as either focused stretch shoulder, gross stretch shoulder, or control shoulder. Scapular kinematic data for the Group B-experimental shoulders (focused stretch, gross stretch) were measured immediately before and after an application of one of the two passive stretch treatments. Group A-Control shoulders received initial scapular kinematic measurements and post-intervention measurements after an approximate 1.5 minute rest period after performing 5 repetition of each movement of Active Range of Motion exercise of Shoulder. This rest period was approximately the same amount of time necessary to apply the assigned stretch to the experimental shoulders. After the collection of demographic data, a detailed tightness of pectoralis minor was measured by inch tape method. The measurement was taken by standing the participant erect with resting his arm at their side. The distance was taken between origin and insertion of the muscle. The scapular protraction was measured in three position of the shoulder joint i.e., 0 0 , 45 0 , and 90 0. The lateral part of calliper was placed on top of inferior angle and medial part of scapula was placed on corresponding spinous process. The scapular measurement for maximum abduction was measured with gravity inclinometer, the device was placed in the root of spine of scapula. This position was established so that when subjects elevate his arm, their arm were raised in the scapular plane (40 0 anterior to the frontal plane) while maintaining the contact with the guide pole. The measurement is taken in the maximum elevation of the arm. Results: After measurement of the pectoralis minor length the mean in 0 week for Group A (X=7.56), Group B (X=8.8,) and in 4 th week for Group A (X=7.66), Group B (X=9.65). The mean of ROTATION 90 UPWARDS 0 week for Group A (X=15), Group B (X=11.9) mean of ROTATION 90 UPWARDS 4 th week for Group A (X=16.33), Group B (X=15.46) mean of SCAPULAR PROTRACTION 0 week for Group A (X=8.38), Group B (X=8.162) mean of SCAPULAR PROTRACTION 4 th week for Group A (X=8.48), Group B (X=8.54) With t-value and p-value of pcetoralis minor length cm on pre (0 week) is t=0.02476 and (p>0.05) t-value and p-value after 4 th week is t=3.275 and (p<0.05) with t-value and p-value of ROTATION 90 UPWARDS on pre (o week) is t=0.04057 and (p>0.05) t-value and p-value after 4 th week is t=1.3096 and (p<0.05) with t-value and p-value of SCAPULAR PROTRACTION on pre (1 st week) is t=0.00276 and (p>0.05) t-value and p-value after 4 th week is t=0.0034 and (p<0.05). Also the graphical representation of data clearly shows that as compared to group A Group B has significant difference in (pre-post session) in all three variables. Upon intergroup analysis this shows that Group B has shown significant improvement than that of Group A. Conclusion: Passive stretch manoeuvre are effective in maintenance of conditioning of pectoralis minor muscles and scapular kinematics among collegiate swimmers.