The effect of short-term strength intervention on muscle activity of shoulder girdle during simulated crawl in elite swimmers

Background: Specific strength intervention can influence muscle activity during swimming performance and increase pain. Objective: The aim of this study was to assess the effect on pain simulated crawl in elite swimmers. Methods: Fifteen Czech swimmers (4 females, 11 males) within age 22.8 ± 3.4 years participated study. At baseline, evaluation performed. For shoulder joint assessment, visual numeric scale (VNS) Swimmer's Functional Pain Scale (SFPS) questionnaires were used. Participants underwent surface electromyography (SEMG) examination 8 evaluated muscles (trunk upper arm) a 100 metres race ergometer (VASA SwimErg, Essex Junction, Vermont, USA). After 30 minutes long intervention, SEMG, VNS SFPS again. smallest important change activation set 10%. Results: not significant all muscles, however size showed small biceps brachii (p = .311, d 0.33), part trapezius .033, 0.46) serratus anterior .103, 0.22) medium lower .053, 0.62). Magnitude-based decision analysis highly increased brachii. Also as well. Difference before after dominant limb according questionnaire statistically significant. Conclusion: A had m. trapezius. There no