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The purpose of our study was to investigate the influence of a single swim training on isometric scapular muscle strength and the static position of the scapula in a sample of 30 healthy adolescent swimmers who were measured on two sessions at a local aquatic center. Fatigue as result of a single swim training session may influence scapular position and strength. Measures included isometric evaluation of serratus anterior and upper trapezius peak isometric force using a push and shrug procedure, serratus anterior to upper trapezius strength ratios, and a semidynamic evaluation of lateral scapular displacement employing the Kibler method. When tested using a repeated-measures ANOVA, none of the strength parameters changed significantly as a result of the single swim training. Adolescent swimmers did employ higher values for the serratus anterior than for the upper trapezius. In the three positions of the LSST, the lateral displacement of the scapula increased significantly after the training (p = 0.001, p < .001, p < .001) and a minor scapular asymmetry was found. (p = 0.037, p = 0.011, p = 0.005). The highest LSST values were present on the dominant side, at both test moments.

Influence of a Single Swim Training on the Scapular Position and Isometric Muscle Strength in Young Swimmers