Influence of Maximal Strength on Bench Press and Trunk Rotation in Adapted Shot-put: A Pilot Investigation

Abstract

PURPOSE: Shot-put is a complex ballistic movement that involves segments’ translational and rotational motions. Its goal is to release the shot at maximum forward velocity (strength) at an angle of approximately 40º (rotation). Considering the adapted shot-put, those two components could be more limited in action. Therefore, the present study aimed to examine the correlations among the one-repetition maximum (1RM) test in the bench press (BP1RM) and trunk rotation (TR1RM) and the throwing distance of the adapted shotput and body composition (Fat mass and Fat-free mass [FFM]), and the throwing distance of the adapted shot-put (TD) and 1RM results.METHODS: Eighteen non-professional athletes were evaluated, and their anthropometric data were obtained (bio-impedance measurements). Afterward, the participants performed the BP1RM and TR1RM exercises. Finally, they performed the adapted shot-put in similar conditions as the official competitions, where three trials of ASP were performed, and the best of these trials were assessed.RESULTS: The results showed a significant relationship between the throwing distance and 1RM results for both exercises (BP1RM (<i>p</i>=.040) and TR1RM (<i>p</i>=.002)) and with the amount of FFM (<i>p</i>=.045). Concerning FFM relationships, the results showed a positive relationship with both 1RM exercises (BP1RM (<i>p</i>=.034) and TR1RM (<i>p</i>=.003)). The Fat Mass results demonstrated an inverse correlation only with BP1RM (<i>p</i>=.035).CONCLUSIONS: The results suggest that physical preparation, including BP1RM and TR1RM exercises, are fundamental to improving adapted shot-put performance. This showed preliminary indicators of which variables may influence the adapted shot-put that might help coaches and athletes to improve their performance. Nevertheless, those results should be carefully considered since the movement evaluated was very complex, especially when performed by participants unfamiliar with them, and because the same analysis included both sexes.