A Comparison Between the Traditional and Novel Isometric Mid-Thigh Methods and The Relationship to Countermovement Jump Performance.

Abstract

The isometric mid-thigh pull (IMTP) test using the traditional bar grip (BAR) is a reliable and effective measure of strength performance in different populations. In addition, IMTP performance has been linked to jump performance. Recent research has shown that the pelvic belt (PEL) IMTP method produces higher absolute and relative peak force values than the Bar IMTP method. However, limited scientific data has examined the PEL IMTP method performance data and its relationship to dynamic strength and sports performance. The study aimed to provide a more robust comparison between the BAR and PEL IMTP methods and examine the relationship between these methods and several countermovement jump (CMJ) performance variables. Thirty healthy National Collegiate Athletic Association (NCAA) Division III athletes volunteered for this study. Each participant was asked to attend and complete four separate lab sessions utilizing a bilateral force platform. The results of this study demonstrated that peak force and relative peak force were significantly (p ≤ .05) greater during the PEL IMTP method than during the BAR IMTP method. Further, force development increased similarly in both the BAR and PEL IMTP methods, although there were no differences between the methods (p>.05). Lastly, Pearson's product-moment correlations demonstrated a medium and significant (p ≤ .05) relationship between CMJ and PEL IMTP variables. In conclusion, the PEL IMTP can measure lower body force performance capabilities. Further, PEL IMTP variables can be used to predict jump performance and, therefore, may be used for assessment and training purposes.