INTRODUCTION: A wide variety of lower extremity strength diagnostics are regularly used to assess strength and power profiles in various winter sports 1. Although the sport-specific demands of each discipline are unique, common diagnostic methods, such as unloaded and loaded jumping are used across all disciplines. The purpose of this study was to identify interchangeability between testing modalities 2, as well as differences between disciplines to identify the most relevant strength diagnostics for various winter-sport disciplines. METHODS: 42 male and female world-class athletes across freestyle (FS - n = 9, slopestyle, halfpipe, freeride), alpine (AS - n = 7 downhill, super g, giant slalom, slalom), cross-country (XCS - n = 10, cross-country, biathlon), and ski-jumping (NJ, n = 16) performed strength diagnostics, including loaded and unloaded jumping (force-velocity profiling (FVP), unload squat (SJ) and counter movement jumps (CMJ)) as part of pre- and post-season testing between 2019 and 2022. Relevant parameters for each test were extracted and compared between disciplines using an ANOVA. Correlations between test parameters for each discipline were assessed using Pearson correlation coefficients. RESULTS: Both SJ and CMJ jump height, as well as FVP F 0 and P max were greater for NJ than for XCS athletes. All other parameters were similar across all tests and sport types. Significant strong correlations between test parameters FVP P max, SJ and CMJ jump height were observed, as well as between SJ and CMJ maximal power. DISCUSSION/CONCLUSION: Although test parameters generally show similar results between sport groups, finite group differences were observed in each test - but only between NJ and XSC athletes. Most importantly, the wide range of correlations observed between test parameters indicates partly redundant information between tests (ex. P max, SJ/CMJ jump height). Generally, similar jumping performances were observed across all jumping tests and between various winter sport athletes, despite a high degree of variation in sport-specific demands. The strong correlations between similar output parameters of different jumping tests invite simplification of jumping diagnostics to reduce test redundancies. REFERENCES: 1 Andersen, R.E., 1990. J Sports Med Phys Fitness 2 Fessl, I. et al., 2022. Int J Sports Physiol Perform
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