Abstract Decreased adductor muscle strength has been shown to be a risk factor for the development of future groin injury. The purpose of this study was therefore to examine standard values of isometric adductor muscle strength in Swedish male soccer and to map any differences in muscle strength between non-injured players and previously injured players. Twenty-one male soccer players were included in the study. A handheld dynamometer was used to record maximal isometric adductor muscle strength. The average value for isometric adductor muscle strength for all included players was 2,709 N/kg [± 0,37 SD]. Average values for non-injured and previously injured players were 2,716 N/kg [± 0,41 SD] and 2,537 N/kg [± 0,25 SD] respectively. The average value for the contralateral, non-injured side within the previously injured players was 2,86 N/kg [± 0,43 SD]. The difference in muscle strength between previously injured players and non-injured players was not statistically significant (p = .162). Conversely the difference between the non-injured side and the injured side in previously injured players was statistically significant (p = .018). Future studies should focus on including players of different levels to conclude whether the differences observed in this study is present regardless of the level of play.