Quantification of high speed actions across a competitive microcycle in professional soccer Campos Vázquez, Miguel Ángel Zubillaga, Asier Toscano Bendala, Francisco Javier Owen, Adam Lee Castillo Rodríguez, Alfonso Sprinting Fitness Injury prevention Training GPS Football This study has been funded by the project PPJIA2020.04, of the Precompetitive Research Projects program for Young Researchers of the Own Plan 2020, of the University of Granada. The main aim of this study was to compare the high-speed training session (TRs) and competitive match (OMs) demands induced on professional soccer players across an in-season microcycle. Maximum velocity (MV) and the number of actions and distance performed at high (N-HV > 14.4 km.h(-1)), very high velocity (N-VHV > 19.8 km.h(-1)) and sprint (N-SP > 25.2 km.h(-1)), in different distance zones (0-5, 5-15, 15-30, >30 m) were evaluated. Twelve professional soccer players competing within the Spanish 1st Division were the participants of the study. TRs were categorised according to days leading to the match day (MD-5, MD-4, MD-3, MD-1). The results showed significant differences between OMs and TRs across all analysed variables, except for N-HV, N-VHV, and N-SP 15-30m in the comparisons between OMs and MD-4. In addition, N-SP 15-30 m in MD-4 and MD-3 were significantly higher than in MD-1 (ES = 0.87 and 0.80, respectively) without differences in MV highlighting a tapering strategy. To conclude, the current investigation revealed a potential tapering strategy in professional soccer in conjunction to highlighting a way of maintaining MV and high speed actions across low-distance ranges (<15 m). Therefore, it would be necessary to further induce task with high-velocity actions in high-distance ranges (>30 m) across the TRs in order to replicate the velocity peaks occurred in OMs. 2023-10-24T09:59:31Z 2023-10-24T09:59:31Z 2023-01-01 journal article Campos-Vazquez, M.A., Zubillaga, A., Toscano-Bendala, F.J., Owen, A.L., & Castillo-Rodríguez, A. (2023). Quantification of high speed actions across a competitive microcycle in professional soccer. Journal of Human Sport and Exercise, 18(1), 21-33. [https://doi.org/10.14198/jhse.2023.181.03] https://hdl.handle.net/10481/85209 10.14198/jhse.2023.181.03 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Universidad de Alicante