Background: This study will analyze the effect of Whole Body Electromyostimulation (WB-EMS) in strength and body composition outcomes in adult population. Methods: This study will search the following electronic databases up to July 21, 2020: PubMed, WOS, Scopus, SPORTDiscus y EMBASE. There will be no language limitation. Two authors will independently identify titles/abstracts and full text all potential studies, and will collect data from eligible studies. Additionally, study quality will be assessed by PEDro Scale risk of bias. We will conduct meta-analysis if enough trials are included. Results: This study will explore the effects of WB-EMS in strength and body composition outcomes. Conclusion: The findings of this study may summarize the effectiveness of WB-EMS in increasing strength and improving body composition in adult population.